Similarly for being a badge-checker at an anime convention, especially if you hadn't intended to volunteer for the duty. The same questions every time.
This troper got agonisingly bored very quickly. "Welcome to the Consuite! Can you show me your shiny thing?" "Is there rice?" "There's no rice yet, but it ought to be along shortly. Welcome to the Consuite! Can you show me your shiny thing?" "Hey, do you guys have rice?" (Eventually I decided to spice it up by running my mouth at total random, and eventually began something that was half-banter with an unwilling captive audience, and half audience participation. The shiny thing, in case you were wondering, is the holographic tape that identifies an actual badge versus a photocopy. By the way, people, please, no matter how hilarious it seems at the time, wear your badge on your shirt or somesuch. Not on your bra. Not down your pants. Not on your garter under your skirt. Jeez.)