I'm not sure what right you are concerned about. There is no "right to not be bothered by political nonsense", but there is a right to free speech for other students. Just as you can't argue that billboards and talkative salespeople should be outlawed, I'm not sure you can realistically argue that students who want to talk politics should not be allowed near you.

There is no right to not be confronted with difficult ideas.

Simple: you don't have that right. Consider a nation with a different set of laws, a greater degree of tolerance and open-mindedness, and/or home schooling.