Ehhh...

There are some 'cheat' mods. I remember a decade ago there was a slew of mods that added weapons and spells that did something like 9999 damage. I would personally call that cheating, but who really cares in a single-player game.

That being said, I did get annoyed by them because they kept crowding out other, better mods from Nexus's front page. But thankfully you don't really see that type of mod anymore. I assume the playerbase gradually grew up so that the average age was over 12.

Granted, my view is probably fairly skewed due to being harassed by a (presumed) kid for a week to do the same with a mod I made.