Rule #1 of Counting cards - Never admit/hint that you can count cards, especially in a Casino and at a table.
Kinda makes you think if the girl knew how to play to since she spilt her drinks at the most opportunistic times.
I say let them be angry if they want. Don't try to reason or tell them to shut the F*** up either, it just makes them even more intolerable. If they want to lose money let them, but don't let them make you lose money just because they're mad. Just keep playing and if they get pissed, just say...
I don't mind people who switch from one spot or two spots, and who go against BS. It only matters the way you play your hand. People who yell and get angry when they lose are annoying, but just ignore them and have fun.