When we were young, long-haired hooligans, we loved to cause a ruckus at stores and get asked to leave. Nothing that would get us perma-banned, but enough to get the boot. Hey, we didn't have the internet. We had to do something, lol. Some of the things that worked pretty good:
a) Wear the George Carlin shirt that says "Simon Says: Go **** Yourself". I got escorted out of the mall pretty quickly with that one. That wasn't intentional, I wore that shirt all the time, lol. I was a bit of a d'bag in those days.
b) Go into a big-box store toy isle, have a friend a few isles over, and play volleyball over the isles
c) If 'b' doesn't prove effective, take the bikes for a spin around the store
d) This was unintentional, but it worked - at an electronics store, my friend wanted to see what a receiver sounded like, so he took the display model off the shelf and walked it over to a system that was playing and started to hook it up. He was blindly feeling for the AC plug and got shocked and yelled an expletive, lol. We were asked to leave. Funny though, he was actually interested in buying it, and we looked all over for an employee to help, but couldn't find anybody. I think we were just long-hairily-profiled.
e) This one will get you kicked out before you even enter- have a bunch of friends show up at the far edge of a mall or big-box store parking lot and set up impromptu drag-racing. Paul Blart will come screeching up with the green lights a'twirling.
Basically, when I was a teenager, the way we looked (long hair, leather jackets, etc), people watched us like hawks. Especially if we were in large groups. We were 80% kicked-out before we even tried anything, lol. I couldn't blame them. Especially as an adult now, I would hate to see a group of kids like us coming through the door.