Insulting the gods and the entire population of Vvardenfell.
Funny story, really, I went around saying
* "Morrowind sucks, the only people who are still in it have to use mods to keep things remotely interesting, better to do away with it entirely!"
Well, those wacky psychic horse-fuckers, the imperial guards, may have overheard this and brought me in for questioning. My explanation did me not much good, they seemed to think "mods" meant other gods and thought it blasphemy.
"And these Mods," They asked, incredulous, "allow for striking at a foe to prove effective without much skill(points)? To view the world as though it were beautifully detailed? (graphics mod, I think) this surely is worse than any daedric magic and shall never be spoken of again! Have this heretic scheduled for execution immediately!"
I may have also let slip my thoughts on what corrupt, amoral fuckwads the guards were, only showing the slightest competance when I break the law, otherwise abusing the innocent and ignoring all quest-related criminal incidents, not counting good ol' Hieronymus Lex, of course.
*[sub]Note: For those planning to say vanilla Morrowind is still great, this is called an opinion.[/sub]