I ate dinner at a restaurant tonight and the guy behind me had the most foul obscene filthy mouth.
Was he expressing himself with that foul mouth?
He wasn't expressing himself he was craving for my girl
Some people feel a sense of entitlement and disregard for those around them. The next time you're experiencing this in restaurant, talk to the manager and see if you can be moved.
I'm planning to beat the crap out of him
You shouldn't resort to violence because then you will be the one kicked out. He may also press charges against you and your life could become more difficult. It's better just to leave the restaurant or reporting before escalating to violence as you could also ruin everyone else's evening.