We want fun, interesting, and helpful content on the site at all times for everyone, at any time, to see and enjoy. Allowing members to continuously edit or delete their own posts would simply cause too much confusion, it would make it very difficult to find and catch spammers and/or duplicate accounts/posts, and it would also constantly fluctuate Xper points for EVERYONE on the question.
We always encourage you guys to carefully consider what you post so as to avoid "posting regret".
I wouldn't see the harm in having something like one edit per post, or not even that much... maybe like 1-3 edits, maximum, every 24 hours just to keep things in reasonable order and so it doesn't get abused.
Sometimes you catch some funky grammar after the fact, after you've already posted and it kinda sucks... lol
Not really a huge deal either way though, in my opinion.
I don't think it would be a good idea, as users for trolling and other stuff. Someone could ask do you drink water, than after getting opinions edit the question, do you drink urine. People would also post very negative opinions and comments, then delete them before getting trouble.
They definitely need that feature. I left a word out of a sentence once. That caused my sentence to be incoherent. Google+ has that feature. I don't understand why this website doesn't. This is not like Yahoo Chat. The answers are not being typed and entered in real time.
We have the hundreds of moderators to delete offensive answers/comments. Also, GAG has the option for you to edit your own question.