If a user want to "permanently delete account" they should have the option to, this includes every post they have made being deleted.
There may be various reasons for why they may want to do this but one of the most important is for security reasons e.g. if they post alot in misc then that info can be collected etc this posses a security threat.
we already know that we can change the password and never log in but what is more important is to have the posts deleted WITHOUT DELETING 1000'S OF INDIVIDUAL POSTs.
so admin what do you say? a feature for users that may require it. if new users deleting accounts is a problem then maybe only have it for users that have been a member for 2+ years. Also if "accidental deletion/change mind" thing is a issue then maybe we could have a "cool off" period whereby the account is suspended for 2 months before permanently deleting it.
look forward to ur reply. again this is only a suggestion.