my group wanted to submit as an idea 'tax on soda'. I was adamantly against the idea. Ignoring the fact that I don't think it would work, its not a 'NEW' idea, and the company that was holding the comp was doing this for PR, and this doesn't seem like an idea they'd choose as a winner. However, when the groups got back together, all of the other groups submitted the same idea, tax soda.
I was floored. there was over 300 years (3 centuries) of higher education among the groups, and they were completely incapable of original thought.