Apart from the usual wikilawyers warring and reverting everything, I've also recently found lots of bots come by just to tag edits, which were correct, as possible vandalism, etc.
Plus the problem mentioned in the article that it's no longer "okay" just to drop a url into an article, everything has to match some bizarro world template that no one would ever want to fill out given their lousy pay rates.
And for all that, the wiki staff is too stupid/poor/unimaginative to automatically download and archive what the urls in the articles point to, meaning that the whole thing suffers from increasing amounts of link rot.
It's also fun to contribute a new article and then see it nominated for swift deletion because it rubs someone the wrong way and has violated one of a trillion different little wiki policies all put up to justify reverting/deleting otherwise fine content.