Well, there are two main reasons not to delete an account: 1) posts made from that account also get deleted and ruin the flow of threads, etc. and 2) it's simply a waste of time. There's no difference between not logging in and having your account deleted. I have yet to hear anyone give a decent explanation why their account needs to be *deleted* - if you don't like it here, just don't come back.
That said, I'm going to admit something here: the above person only recently joined and made no posts, so deleting his account would not interfere with anything. In fact, under different circumstances, I may have deleted his account (even though doing so is ultimately irrelevant).
Why didn't I then? This user signed up only 4 days ago, and suddenly today he starts frantically asking to have his account deleted. He created this thread, posted in the Shoutbox, and created
SIX other threads across the board asking for his account to be deleted. All in a matter of minutes. I'm not likely to give someone what they want when they ask so rudely. Not to mention, I really don't buy the "I accidentally signed up" story. I'm not sure why someone would feel the need to lie about that, but like I pointed out earlier, it's damn near
impossible to sign up for TFP and not be aware of it.
Spoiler:
Don't worry though...after giving him a couple of days of thinking he didn't get what he wanted, I'll ban his account anyway - for being rude and spamming the forum, not because he asked for it.
EDIT: Oh, and what will said too.