Sounds like you're arguing for info-bubbles Pat. Sure everyone generally knows what a given speaker is going to speak about. Students don't have to go (unless, of course, they do ala "Liberty" Uni and Ted Cruz incident), don't have to agree, etc.
The cultural holywars over who is the most victimized person or group in the room is both goddamn disgusting and hilarious. Hilarious in that first world idiocy is now past coming out and is throwing a pride parade, and disgusting in that it happens in such a way as to stamp out even the pretense of intellectualism at the institutions which are supposed to have that as their primary function.
Lets end the pretense of classes, athletics, etc. and admit the university system is just the continuation of day care through the "emerging adulthood stage". Padded cells and pacifiers for all the sweet innocent vulnerable children. And beer.