As it is a cash game the punishment for this is usually just a word from the dealer/and or players!
but any serial offenders should be banned from the game as they are affecting dynamics/gaining info
Not necessarily, actually. I think this is one of the issues that can put off new players coming into the game. Poker itself is very intimidating as a game, and I think we often forget how nervous we felt that first time in a casino. First time I played a proper live tournament I was accused of slow rolling. I had no idea what this meant, but from the sniggers around the table and the response of the person who it was done to, I gathered it was probably a bad thing. If it wasn't a tournament, I would probably have got up and left. The point of this post really is that we have to try and empathise with the people we are playing with. If we shout at them for not knowing who the action is on, throw penalties at them for rules that they have unintentionally broken and take it upon ourselves to police all of their actions from that point on, we will leave these people feeling even more intimidated and belittled by the experience. They won't want to come back, and anyone who plays the game has a responsibility to ensure people
do enjoy their experience and
do want to come back. If it's a reg, then you can ask them what's going on and offer to buy them another beer. If not, mention it to them for sure, but try and do it in as friendly a manner as possible.