I can only see his behaviour - abruptness, desperation to get the thread deleted etc - being the result of the prossie threatening to out him. He feels humiliated, hence compensating by telling us about how tough he is, which was probably more for her benefit as she is no doubt reading this.
He's recently admitted not having a punting phone, and if the jiu jitsu thing is true, did he mention this to her and give her even more clues to his identity? I'd guess that a google search on his mob number, or other info he's revealed would give her more than enough to knobble him.
The fact is though that if she's going to out him she'll probably do it anyway so better to man up and at least make sure that his fellow punters can avoid this skank.