Yes - defiantly! i do have that obligation. More importantly I must hold myself to the same rules.Well sir it seems as though you have an obligation to ensure that the rules are enforced evenly for everyone.
It's also worth mentioning that this individual is disrespecting not only the game but you personally with his conduct. IMO, I'd send him an email or a text diplomatically yet firmly telling him to stop doing that. I don't think you need to outline any reprimands - most decent people will realize they've inadvertently been disrespectful and adjust their behavior.
Now if it continues beyond that measure, I think you're in your purview as host to call it out deliberately in real time. Whether you handle it with snark or aggression or sarcasm is pretty much up to you - but I'd probably suggest saying whatever you have to in order to effectively get your point across.
my rules don't have consequences per se.
They are about:
- education, (this is the most important point to the rules. eg in this case its (potentially) a way to cheat by shorting the pot).
- game play,
- integrity of the game and
- etiquette.
There is 1 exception. I have one rule that does have a consequence.. Don't be a dick. Its subjective, but your in my house and its not a democracy.
2 have failed this test and they are not welcome anymore.