Currently my MyBB forums are spammed with horrible stuff that I would rather not make my users go through. Besides the other reasons I am going to switch over, this is a big one. Are XenForo Forums spammed a lot?
+1 for this. Once properly configured (takes a couple weeks of spotting the stragglers) catches 100% of the spam, once a month i get 1 or 2 moderated maybes. Never had a false positive reject.
Plenty of spam is manually done now. Meaning anti spam methods such as captcha's dont work for crap.