[Carpe Cerevisi]

Guys hanging around without buying anything are guys who could easily be scoping out the place in order to come back later and rob it.

So could the people who are actually buying and drinking coffee.

[Slyfox]

Yeah but, usually if you spend a lot of time drinking coffee at a Starbucks you become a regular and you would be upset if anything happened to your Starbucks. And you would be upset if it got robbed.