This always happens. We have a table of water bottles and gum with a sign that reads "$1.00 for gum or water". Someone always takes the gum or takes a water bottle without paying. What's worse than this though is leaving evidence. Last night, I see that a pack a gum was opened, one stick was taken, and the pack left behind. It's safe to assume it wasn't paid for. Just because the lesson's free doesn't mean the gum or water is free. Pay up.