Like those seemingly harmless tiny rats and beetles that lurk around in the towns. Every time I get near them, the battle music will start playing, and a guard will attack them. Just wondering if this is normal or not.

Here's my load list.

Active Mods
001 Morrowind.esm
002 Tribunal.esm
003 Bloodmoon.esm
004 Texture Fix 2.0.esm
005 Morrowind Patch v1.6.5-BETA.esm
006 Book Rotate.esm
007 Poorly Placed Object Fix 1.2.esm
008 GDR_MasterFile.esm
009 Morrowind Advanced.esm
010 Better Heads.esm
011 Better Heads Tribunal addon.esm
012 Better Heads Bloodmoon addon.esm
013 Rise of House Telvanni.esm
014 TR_Data.esm
015 TR_Mainland.esm
016 H.E.L.L.U.V.A._Merchant_Containers.esm
017 Dragonscale.esp
018 AtmosphericSoundEffects-3.0-Tribunal.esp
019 Balconyhouse.esp
020 Passive_Healthy_Wildlife.esp
021 Clean jet_gold_armor.esp
022 Clean Kynareth.esp
023 Clean Arkay.esp
024 Clean Akatosh.esp
025 Clean Dibella.esp
026 AscendedSleeperSFX.esp
027 Beds4Rent.esp
028 Carry your Bedroll.esp
029 Hold it - replacer.esp
030 Lgnpc_SN.esp
031 LGNPC_GnaarMok_v1_20.esp
032 LGNPC_AldVelothi_v1_20.esp
033 LGNPC_MaarGan_v1_20.esp
034 Divine_domina_part_1.esp
035 Divine_domina_part_2.esp
036 Divine_domina_part_3_Tribunal.esp
037 LGNPC_HlaOad_v1_32.esp
038 Unique Tombs.esp
039 AmethystArmourWeapons.esp
040 Area Effect Projectiles (PAR Edit).esp
041 blackheartarmor.esp
042 BTB - Alchemy.esp
043 Loincloth_top_ pkg2.esp
044 The Neverhalls.esp
045 LGNPC_Aldruhn_v1_20.esp
046 The Inquisition.esp
047 LGNPC_Aldruhn_v1_21_suppl.esp
048 Divine_domina_part_4.esp
049 LGNPC_Pelagiad_v1_31.esp
050 Master Index Upgrade.esp
051 LGNPC_TelMora_v1_30.esp
052 MW_Adv_PHW.esp
053 LGNPC_Khuul_v2_21.esp
054 LGNPC_VivecFQ_v2_20.esp
055 LGNPC_TelUvirith_v1_20.esp
056 BAR_MournholdTeleportationFix.esp
057 BetterBooks_AlchFormfix.esp
058 VA_BlueYmsidril.esp
059 VA_EbonyReplacer.esp
060 VA_Ymsidril.esp
061 LGNPC_IndarysManor_v1_51.esp
062 LGNPC_VivecRedoran_v1_61.esp
063 Quieter_UI_Sounds.esp
064 Less_Generic_Nerevarine.esp
065 Nasty Camonna Tong.esp
066 Ancient Bronze Armor.esp
067 JojjosFrostmourneForMorrowind.esp
068 LichKingPauldronsHelmet.esp
069 New Argonian Bodies - Mature.esp
070 InterventionPlus.esp
071 Morrowind Crafting Equipment.esp
072 Daedric Crossbow.esp
073 Clean Dragon Blade.esp
074 Acheron's Camping Gear 2.esp
075 KRS_SFG.esp
076 Widow maker crossbow.esp
077 EW_Glass_Shortsword.esp
078 Clean PJM Themed bowsets.esp
079 MW_Adv_Required (BTB Edit).esp
080 New Khajiit Bodies - Mature.esp
081 MoragTongWritFix.esp
082 Less_Generic_Bloodmoon.esp
083 Djangos Dialogue.ESP
084 Romance_v37EV.esp
085 Deus Ex Machina - A Steampunkyish Mod.ESP
086 Romance_Follow_v10EV.esp
087 Antares' Big Mod 5.3.esp
088 Vivec Signposts.esp
089 Barabus' fireplaces 2.esp
090 Daedric Broadsword.esp
091 Persuasion Response Expansion.esp
092 mel_teleportPlugin_1_3.esp
093 sm_ForgottenHalls.esp
094 DN-GDRv1 (BTB Edit).esp
095 Clean Icxth, Morrowind Edition.esp
096 Creatures.esp
097 Creatures Merged Objects Fix.esp
098 Glass Weapons For Ninjas.ESP
099 BTB - Equipment.esp
100 K_Potion_Upgrade_1.2.esp
101 LGNPC_PaxRedoran_v1_20.esp
102 mel_teleportPlugin_1_3_Patches.esp
103 Psy_VGR_Armour.esp
104 DreadKnight.ESP
105 TLM - Ambient Light + Fog Update.esp
106 TLM - Light Sources (Clearer Lighting).esp
107 TLM - Light Sources (Natural Water).esp
108 Animated Morrowind II.esp
109 Syc_HerbalismforPurists (Pearl Bug Edit).esp
110 k_weather (louder sounds).esp
111 Syc_HerbalismforPurists_BM.esp
112 Syc_HerbalismforPurists_TB.esp
113 Less_Generic_Tribunal.esp
114 almalexia armor.esp
115 More Quick-Keys.esp
116 BT_Whitewolf_2_0.esp
117 Lich King.esp
118 DX_Thedungeon.esp
119 Sotonhorian.ESP
120 Better Bodies.esp
121 Holy King Armor.esp
122 Ice_RubyKnightsArmor.esp
123 Royal Golden Armor v3.1.esp
124 UAR_EbonyHelms_v2.esp
125 I wished I had a Hobbit hole! v-2.2.esp
126 Better Skulls.ESP
127 OR_Fang.esp
128 TLM - Light Sources (Lanterns).esp
129 TLM - External Lights Ownership.esp
130 NX9_Guards_Complete.ESP
131 OR_ForkH.esp
132 entertainers.esp
133 P.R.E. v4.0.esp
134 master_index.esp
135 LeFemmArmor.esp
136 Nudity Greeting Expansion V1.esp
137 NX9_Guard_LGTrib_patch.ESP
138 NX9_Guard_LGRedoran_Patch.ESP
139 adamantiumarmor.esp
140 EBQ_Artifact.esp
141 Siege at Firemoth.esp
142 DXM_masterindex_journalfix.esp
143 Quick Char.esp
144 Book Rotate - Tribunal v5.3.esp
145 ExcellentMagicSounds.esp
146 Book Rotate - Bloodmoon v5.3.esp
147 Akavirian Armor V 1.0.esp
148 A_flock_of_seagulls.esp
149 Arrow De-nocker.esp
150 Oriental weapons pack.esp
151 HospitalityPapers.esp
152 Animated Morrowind 1.0.esp
153 dxm_metallic_signs.esp
154 GnisisEggminePass.esp
155 DremoraLords.esp
156 EcoAdjCrime (Tresspass Edit).esp
157 EcoAdjMerchantSkills (Disposition Edit).esp
158 HerTamedLightning.esp
159 tong.ESP
160 TLM - AdjMod - Siege At Firemoth.esp
161 Gem Drainer(simple).ESP
162 HELLUVA Balanced Complete.ESP
163 HELLUVA Balanced TR Addon.ESP
164 Twin Blades of Azzinoth.esp
165 OR_SpiritEat.esp
166 k_in_tent.esp
167 Morrowind Crafting 2-1.esp
168 TLM - Adjust - Ald-Ruhn, The Rat In The Pot.esp
169 TLM - Adjust - Arena (New Lighting).esp
170 TLM - NPC Light Sources.esp
171 Better Clothes Complete (BTB Edit).esp
172 yalsm.esp
173 HELLUVA Balanced Creatures Addon.esp
174 Fair Magicka Regen (one Percent).esp
175 DM_DB Armor Replacer-ExpDDBA (BTB Edit).esp
176 Syc_AtHomeAlchemy.esp
177 Raven`s Armor.esp
178 BoundWeaponReplacer.ESP
179 IceNioLivRobeReplacerPLUS (BTB Edit).esp
180 Complete Armor Joints.esp
181 IndorilSpear.ESP
182 New Lord's Mail.ESP
183 Mashed Lists.esp

I think so. That's how I remember it from Creatures X.

Some do, some don't. The only problem I've had with them this game is that they just keep multiplying. I'm having to kill them just to be able to walk across town. In Balmora, I believe I've only had one rat attack me.