If so, does the content that I posted on here stay on here under my name or does it show up as "deleted user" or something like that?
You can not delete your account. Admins don't do it for you.
There are alternate solutions: Change username to Anonymous, abandon your account or send a request to theymos to change your username to a new one if you have valid reasons why current username is dangerous for your anonymity, you will be doxed ...
Deleting accounts doesn't mess up any threads, like
this thread. It just changes to anonymous, with no profile information. Post stays intact.
As you can see here, I only change the username to "Anonymous" on request.
It's not possible. Just abandon it.
Done. Now only moderators, Donators, and VIP members can change their names automatically. Other members should contact me. I'll probably ignore your request if you have less than 50 posts (unless your posts are very good).