Been to a few conventions, and I do have to say that for the most part, bronies are more mature than college parties that I've been to (Not to bash college parties as well). There is this one instance at EQLA when a crowd waiting in line for a concert got a bit "rowdy," enough that Con security got a notice from the hosts (This convention is next to a hotel lobby, which is in a hotel, btw), but to be honest I learned that immaturity is spontaneous, can be nullified, and is just a symptom of society as a whole. I think if you're actively seeking stupid people (i.e., hanging out with them), you're bound to find stupid people.