I like it. I wish I had thought about it in time, but it would have been cool to do up a bunch of signs with both slogans (one on each side), and have a bunch of Freepers just slip into the crowd with them to see if anyone would notice.
Every time I see the invaders on TV or hear them on the radio, their most common theme is "We're not criminals!"
So you know that is their touchiest subject. Very touchy. That's where to drive it in.