It is an option, as evidenced by the member who started this thread. It just can’t be done at solely a member’s discretion.
These two things run contrary to each other. Someone who wants Internet privacy likely practices “cyber hygiene” by not reusing usernames or passwords.
It’s doable, on a case by case basis, with the help of a Mod/Admin. It definitely shouldn’t be easy, because people would do it more often.
We play whack-a-mole already when trolls pop up. Making it even easier for them to appear, cause trouble, delete themselves after they get their pathetic jollies, and then come back again to start over isn’t something we need.
We’ve also had cases where people want threads/accounts deleted simply because they got an answer to their question. Like, they’ll start a thread, get awesome on-point replies, and then want to delete it because they think the thread isn’t useful to the forum as a whole.
Then there’s the people who talk themselves into a corner, start arguments/“debates” with multiple members, and want to disappear to save face instead of simply being wrong. That’s also a no-go.