no,i don't think it would help. proof-reading is better than allowing people to troll us,dumb bitches to change their statements so they don't get hated on for things they should be hated for,and insulting people and changing it before it gets deleted. proof-read your Q's,it's not that hard.
I'd love an edit feature, if nothing else but to make sure people actually go back and use paragraphs. Honestly, I don't both reading a lot of questions to those people who don't hit the "enter" key once in a while. I'd love an edit button. If the site staff or moderators see this, hopefully they can pass on the word to the technical team here at GAG.