What if this is one of those restaurants that makes all the servers pool their tips, and she just wanted to put the cash in her pocket?
Bottom line, she used her First Amendment rights to express herself like a boy in public, and her customers used their First Amendment rights to say they were uncomfortable having her wait on them. You can “say” what you want; but that doesn’t mean others have to like it.
Like the song says, “I can’t make you love me, if you don’t...”
Waitstaff skimming? Never!