...PM a mod and request a deletion or insertion. It's something we do.
If you realize you've made a drastic error, like leaving out 'not', or 'don't,' (we don't correct spelling, as a rule, eg) that will make you or someone else unhappy with your advice, if you were silly enough to post your phone number, or if in the heat of passion you posted something to make you look, well, overwrought and unreasonably passionate about something, contact a mod, and just say, "please delete."
If you realize you've made a drastic error, like leaving out 'not', or 'don't,' (we don't correct spelling, as a rule, eg) that will make you or someone else unhappy with your advice, if you were silly enough to post your phone number, or if in the heat of passion you posted something to make you look, well, overwrought and unreasonably passionate about something, contact a mod, and just say, "please delete."