Is it possible to erase your account here?

Chad, if you posted anything you're not comfortable with, you can always edit your posts to take out those informations (or ask a moderator to do that for you since as a trialist you might have limited editing priviledges). Maybe a milder solution would be to ask for your account to be renamed to "random person 12345" to remove any tie with your "Chad" persona. The account will stay here but it won't be yours anymore, in a way.