Exactly. If the college blocks IRC, then they will frown on you trying to get around that block. Most colleges (in the US) have an agreement as part of their handbook or even separate that states that the network is for educational use only. They usually don't complain about playing games over the network, but if they chose to, they could. IRC is another matter. They're more likely to get upset over that than over gaming. The results of that are either a warning or removal of internet connection from your dorm room or even expulsion.