We're very happy to see such initiatives take place from the student body.
To be fair, as an undergrad, I saw other parts of our campus trashed with beer bottles and everything else imaginable. North Campus is merely a continuation of that obviously long problem, but it's enhanced by the sheer density of people tailgating in the area compared to everywhere else. You can also cite other legitimate reasons (such as MJ did on a earlier post), but the real point is that grown adults should be able to throw away their trash. End of discussion.
I'm going to personally do my best to be an asshole to people about their trash when they are at my tailgate and in the surrounding areas.
I encourage you to do the same. If you've never tried being an asshole, it can be quite fun sometimes.