I'm always confused by requests like this. This is probably the third time I've seen it here, and who knows how many other times elsewhere. Most of the time they aren't even really concerned about the data, they just have some intangible need for their account to be deleted.

it was made "dead", either through lots of flagging (very likely) or a moderator.

either way, I am pretty sure you cannot delete your account history, http://news.ycombinator.com/item?id=1628701 is why I think its a terrible idea.

If you want to not be on the site, change your password, delete you bookmark, just dont visit the url again.

Send an email to pg@ycombinator.com

No use in asking anyone else, since he's the only one that can do it.