From what I can tell, we can't delete threads we started like we could on TN. I tried to delete my "ask me anything" thread, but it only lets me delete individual posts. It's NBD in this case because there wasn't anything super sensitive in that thread, just wanted to let y'all know that we may not be able to delete entire threads like we're used to.
I think you need to ask a mod to delete a thread, but you can delete a post individually on your own, and can lock a thread as well.
I figured this was the case, but I don't want to annoy mods with daily requests to delete run-of-the-mill threads. But I'm sure it would be appropriate to ask a mod to delete a post that got truly out of hand.