Interesting one this. I don't know anyone who openly punts and nobody knows I punt, but I have three acquaintances who I'm 99% sure do. All three display the key ingredients - motive (randy gits), means and opportunity.
I had a night out with one not so long ago and the chatter only served to increase my belief that he punts, probably pretty regularly. At one point I thought he was going to spill the beans and was mentally preparing myself to deflect anything he might say. His reaction to one 'situation' whilst we were out screamed 'punter' at me, basically because I thought exactly what he did, only I kept my mouth shut. I recall thinking to myself at the time 'Yep, that absolutely seals it in my mind' whilst desperately trying to keep a straight face!
tcm