I also read this one on Dogster and I cannot explain how hard I laughed! Just say ideas or ways to get kicked out of wal-mart or stores like it. Here are some examples
Go in wearing sunglasses and go to the fishing department grab a fishing pole then go to the pet aisle and grab a leash. Go to an aisle with a lot of people and start knocking things down with the fishing pole and dragging the leash behind you screaming REALLY LOUD "Max, Max, where did you go boy, MAAXXX!!!"
Drape a blanket around your shoulders and yell "I'm Batman, come Robin, to the batcave" then runoff.
These won't necessarily get you kicked out but they sure are funny!!! You think of some.