Do you instantly delete the account or requested?
Do you ask for them to confirm and stress that it cannot be undone?
Do you ask if they would prefer for their username to simply be changed so that they can deactivate the account at a later date?
Do you charge an administration fee to discourage more requests?
It's not something I get many requests for. In the past, when I've asked the user to confirm that they wanted their account deleted, they have backed down as it was just them feeling frustrated to an argument with another forum member (argument, different views on issues etc).
So how do you go handle deletion requests?