Because i claimed specifically, using a character name. I'm not saying somebody would've counterclaimed roleblocker, although i imagine that if i was taking the credit for the blocks on SVH, pride might make someone do so, i'm saying they'd have counterclaimed captain.
Another cop counterclaiming wouldn't have made sense with the Axeman reveal. There could easily be two, for all anyone knows. But if somebody saw their own character name being claimed, rather than just the same role, then they'd definitely know that not to be the case. That's why i suspected the reveal, when he didn't seem to want to use that name. But like i said, i was wrong.