I think the answer is no for both? Also, when did # of online users break?

There used a search, I think, but it broke and never fot fixed. You can't delete forums or posts, but you can edit your point out and you can ask thr muni-mod of the forum to lock a thread. It's the closest you're going to get to a deletion.

ty

speculation is that the counter broke when the new authentication system was implanted

It broke ever since the new System happened and the users online only consisted of people who login to the new system not counting the people who still login to the old system