Usually nobody will "false call" unless you are being a Slydini and challenging them. Read Strong Magic by Ortiz and you will see.
Although I agree with Darwin's conclusions on challenge magic, I disagree with his assessment of Slydini. Slydini used actual challenges ("you look, but you don't see... watch again, closer this time") as a means of misdirection. He controlled when the spectators watched and where they watched. BUT, Slydini always performed with an internal smile that conveyed, "I'm just joking with you." It is sort of like being taken by a conman as they tell you they are doing it and sincerely promise to give your money back at the end.
I think you guys have the wrong idea of what happened. So, I don't ever challenge my spectators.
It sounds like you've encountered spectators who watch the Masked Magician and Fool Us. They think magic is a game where the magician tries to fool (read make a fool out of) the audience and the audience tries to figure out how they do it. Your presentation and character needs to convey that you don't play that game.
I'd love to see your script or a video of your performance so I can provide some more specific ideas, but here are some things magicians can do:
- Ask the spectators names, introduce yourself and say that you are glad to meet them.
- Compliment them - "that is a really nice ring."
- Ask the spectators questions about themselves - do they play cards, have they seen a magician before, did they have an uncle who did the 21 card trick, etc.
- Start with a story. I do Chad Long's shuffling lesson (which I learned from Wayne Houchin) and talk about wanting to learn how to cheat at cards. I explain that one time in Atlantic City, I met a card cheat named Vinnie the Shark. I then explain that he wasn't what I expected because he looked like Danny DeVito and "the Shark" part of his nickname was because he got bit by a shark he used to keep in a tank in his house. That alone is enough to convey that this is entertainement and not a "fool or bust" game.
- Smile.
- Talk about more than what you are doing. If you focus on what you are doing, they will focus on how you are doing it.
- Always have them show their card to the whole audience "so everyone can enjoy the magic."
- Make it more fun to work with you than to work against you.