I wonder why NPCs can just waltz through a door that we have locked?
If a door is owned by a faction (such as the MagesGuild faction), any member of that faction can go through the door without needing a key, regardless of lock level. The entire interior of the Skingrad Mages Guild hall (including the doors) is owned by the MagesGuild faction.
Since Vigge, the
not so Cautious is part of that faction, he can come and go as he pleases. If you use the console to change the ownership of the door to the PlayerFaction and
then lock it, Vigge shouldn't be able to enter. Buffy, on the other hand, should be able to come and go as she pleases.
So, other than breaking certain quests, we can come up with no other reason? And no one knows why it says 'do not use' in the CS?
According to the http://www.uesp.net/wiki/Oblivion:Lock, the
Lock effect is very glitchy.