In our case, it wasn't "frowned upon". It was so harshly enforced that we had the dumbest fucking event during my early tenure when a bunch of high flying retardmins decided to enforce the "no warez" policy by taking down the local student network's DC hub and getting students who used it temporary university expulsions. They succeeded too for several key figures who administered said hub.
This was a massive bout of idiocy, resulting in easily predictable situation where student network was basically unusable from 17 to 2 after they managed to take the DC hub down. Basically everyone came home from uni, and instead of grabbing their porn, warez, gamez, etc from others on the intranet, they vacuumed them from outside DC hubs, emule, etc. It completely overloaded the edge node, which was never supposed to carry that amount of traffic. I actually ended up getting ADSL for personal usage for a while, because university internet side was just utterly fucking useless at those times for months.
This had to do with a mix of having a couple of high flying admins who were adamant that copyright infringement is the worst crime ever, and national university network itself did in fact have pretty gnarly rules in this regard. To the point where just receiving those standard blackmail letters saying "we found this and this address sharing this file on this service" had those high level admins contact us front line admins and demand we disconnect the port of the person involved on the building switch. I.e. total loss of internet connectivity with no warning and minimal evidence.
Commercial ISPs don't do this sort of stupid shit, because frankly it isn't in their interest to screw over their paying customers. But on university network, students aren't technically paying customers. Student housing association is. And they didn't really care.