But OK, I'll elaborate a bit further still if you don't mind:
1) I'm an onliner first and foremost, and online play is, amongst other things, about trust. Trust, OTOH, consists partly of an unmodified game. Now why exactly should I exchange all this for a game modified w/ components that are IMO largely of substandard quality anyway?
2) I'm not saying all mods are categorically evil, or that no good whatsoever can come from modding the game. But whether this'll ever happen remains to be seen - and as I stated already the current mods, tatty as they are, are really not worth it for me, because how would the other OL players _know_ what I'm running had I any of them installed? Thus, no mods for me, thank you...
3) I could of course install two separate versions of the game for off- and online, or use some kind of mod/original switcher if I wanted to. But again why bother at least yet, because as I stated already the mods that I know of are pretty kludgy? And still we have these soapbox prophets here who with their almighty crystal ball predict that we'll be assimilated soon and all resistance is futile... please
So yeah, maybe some day, as I said already. But with the current offerings? No frikkin' way...