The app requires you to always allow them to track your location. It seemed like an interesting app till I found that out. I probably won't open it back up until I hear that they change this.
Okay, they'll probably work that out pretty quick and ban you. But three or four accounts you might get away with?
You have to be there to get paid, and that is a good way for them to know you actually are. Is there any other way I wonder ..
EDIT: did you mean that the app should turn off tracking when you're not "working"? then you're right but maybe it is due to software or hardware limitations.
Under the stand up ashtray is probably best, no one will look under there.
Not that I would condone such a thing.
A cute way would be to tell you to connect to the Internet using the restaurant's Wifi, and then they'd detect the IP of the connection your phone was making to their servers.