You can only edit a thread or a post for 20 minutes. After that, if you have a post that you want edited or removed, you would contact a moderator via "Convo" and provide a viable reason to have a post edited or removed. Your request will then be reviewed by the staff and a decision would be made as to whether or not the reason for editing or removing is acceptable and further action concerning the post would be initiated.
Same as above for deleting threads.
We do not delete user accounts, so please don't ask.