The rules are posted telepathically! (A bit long and ranty)

[cawaker]

sounds like to me they were just trying to get rid of customers so they can fuck around and play and not work.

[PepperElf]

What if they are a front? Maybe the coffee shop launders money for their software piracy operation, and the fewer customers they have poking around, the better.

oooo good point...
maybe it wouldn't hurt to have an undercover cop check them out...