My! What a touchy thread this has turned out to be.
How about this for an "out there" scenario.
The chasers could really be terrorists. They have the perfect cover now. Develop a "take the out of everything TV show" and then nobody takes them seriously enough to be a real threat. They are recognisable to the cops by now who lower their weapons when they realise it's only those idiots.
Then the dummy TV cameras open to reveal horrible weapons of mass destruction.etc etc etc....
The yank security, who have their sense of humo(u)r genetically altered, no doubt think this is quite a reasonable possibility. Hence, shoot now, too late for questions later.
End of problem.
Lots of fun isn't it.
WB