this will be helpful if you posted something but realize after a few minutes that it's not worth posting
i know some good and bad side to that
(-) abuse people posting something offensive and deleting it outright once the target gets the message
(-) less responsibility on posts since you know you can delete what you started
(+) people who posted out of anger can retract their statement
(+) correct errors or delete posts when you've changed your mind after 5min.
(+) lessen bans