I can understand why you do this, it's very brave, and I'm sure you get a good feeling doing it. I have no doubt that many of us would love to do the same thing. But, IMO, the end result is that you are reinforcing the beliefs of most everyone in the crowd. I think their applause proves that.
One could argue that it is only by efforts such as this that change will take place. May be that's true in some situations, but I think when you are dealing with people who are under mind control, this probably isn't the best method.
I bet whoever put those cards in the programs was having a hard time containing themselves watching them deal with you. I'm surprised they didn't try to make contact with you at the end.