As far as I understood ZOS - You could tweak the UI, which for me was refering to eyecandy move things around add unicorn decals.
Getting into monitors / metets - that tell you every shard location, resource spawn, quest solvers. Cheapens the gameplay and makes you less player.
Getting into PvP - telling you buffs, debuffs, skills, timers to interrupt kind of stuff. That's just cheating - it's advantage over those who "chose" not to use and suffer for it.
And the fact, that it's not about you recording something you found for personal use later. You access a database that tells you EVERY locations of something that you didn't find.
Main concern is advantage in PvP depending on what information can be collected.