Here is more information on the Dine and Dash study that proved 1 in 20 people have done this.
One in 20 diners have walked out of a restaurant without paying
How Common is Dine and Dash, and how can Restaurants Prevent it?
If you call it dine and dash, then I have never done it. But if you call it, "hey, I'm ready to pay, where is everyone. Dang this is taking forever, I need our bill ... screw it lets go." then yes I have.