Actually, Blaze left out what I considered to be the most concerning part of Blackflag's little rant.
[17-05, 04:19] The Flag: I think we'll just wait until Lounge fucks with one of his regular targets again, and they decide to do something about it.
That sounds like personal threats to me. I'd be more inclined to blow it off as nonsense if he wasn't running around with pictures of the guy he was threatening and who knows what other personal information.