I disagree with what most people say. I've started and am now maintaining a VERY successful magic club in my school. The way i did it is that i simply taught them REALLY simple tricks. Not even any sleights, just self working ones, one that i never perform anymore. This weeded out all the "secret hunters". Those who were just there for secrets got bored of it, but the people who actually wanted to learn magic stayed the next few meetings. So now i'm teaching them basic sleights and card handling skills as well as a few easy tricks.
I would say that as long as you have a respected reputation in your school as a magician, there wont be any secret hunters. This means that there are more people who watch your magic to enjoy it than there are people who heckle you. That way only people who respect your magic will stay in your magic club.
Trust me dude, starting a club is very good. Not only does it give you a chance to spread this art, but it is EXTREMELY helpful for college. But that's a whole nother topic.