A blocked member can still interact (@mention) with me in the beta version despite having been included in the Block list in my Privacy Settings. It looks like the block was disabled for some reason because it gave me the option to block. I've blocked the bloke again from the Chatroom. His name is still in my block list.

Edit: I recall it's a couple of them. Another blocked bloke from weeks ago PMed me whom I reported. The recent one aforementioned was days ago. Both were in my Block list.