Threaten with lawsuits? Idk if this is just the country in me, but threatening someone with lawsuits over skylanders.... a little much. If someone messes with your truck/house, yes - lawsuit. But digging in your cart... you gotta handle that yourself.
It can always be used as a bluff, but refusal to comply could very well be a case.
You have just as many rights as they do, anyway. If you can sue a fast food chain for making you fat, you can sue someone over trying to badger you into giving them store merchandise.
But that's just me.