Where I come from with edits
I tend to add citation needed a lot, as I do not like to just delete knowledge and well written articles through simple lack of citation.
So along with editing grammar I like to find more neutral ways of stating "facts", i.e if no citations exist it may be best to point it out in a non-intrusive manner and edit the actual grammar to preserve information (rather than delete) and highlight that the stated "facts" are actual shared beliefs. I am mostly offended then by biased writing, worried that wikipedia can get used as a marketing tool.
Further people keep documenting future events as fact. Adding words like "expected" or "forthcoming" seems to be a good way of dealing with this. People are just trying to add information so much.
Pet gripes that's all, I am not a wiki troll here for ego wars, I feel I have learnt a lot from unsourced articles, but they keep you on your toes and true to the letter policy is actually to delete a lot of this stuff.