Is it illegal to have an anti-prom?

Can the school keep the creators from walking at graduation? That's what I'm worried about, unless there are actual laws on it. It's an official anti-prom. Details: My class is broke. Prom will be expensive. In my sophomore and junior years, I wrote an entire folder of at least 50 fun fundraiser ideas and submitted it to the class advisers. I didn't dare run against the oldies; they were the rich girls that got away with cheating on their Regents tests, so they also have okay grades. When I didn't get any feedback, I heard from the head honcho "____turned in this folder with a bunch of stupid ideas. Even _____ said they were gay." So we're exercising those same fundraisers to have an anti-prom as an example of what hard work and responsibility is. Their resolution is to cry because the class has no aptitude for selling baskets of $100 fruit and gift cards to restaurants that aren't around here. It's going to be integrated and off-campus. So since it is specifically to go against the class' prom, is it illegal?
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No, your plans don't sound illegal. Underage drinking and vandalism does. If these rich girls have a problem with your plans, forget about them. Just do what you want and have fun. BTW, I never went to my prom and have never regretted it.
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