An old friend from school used to display horrible manners when drunk.. I (and others around the friend) got drinks spilled on and endured the one or the other slaps. The person became out of control. We were not very close (even though we shared the same circle of friends), but I ended up driving the friend home a few times when nobody else would. Never heard a thank you, or got an apology since the friend barely remembered what happened Didn't expect it though. Just hoped the amount of alcohol consumption would change at some point ( it did). What I initially did was to let them know of their behavior, but I essentially moved on and tried to avoid being in said friend's company in the future (which was not easy, because it was a very small town)