Menial Worker Syndrome
When a person does a repetitive job that doesn't require intelligence or skill, they look for opportunities to convince themselves that their job - and life - has some purpose. They do this by attacking people - usually passive aggressively - with small trivial facts only someone in that position knows. For instance, a TSA Worker may say "Don't put your bin in that way!", or a Security Guard at a museum may repeatedly point at a vague and unhelpful sign to answer your question, rather than answer with 3 simple words.
Man, that girl got all stupid about which line to go in if you want to see the blue shells, she definitely has Menial Worker Syndrome.