UC Berkeley
I gave a speech as part of an undergrad public speaking class on why gun-control was bad and received an amazingly positive reaction. I'm not trying to brag, but I felt I received more praise for my speech than anyone else received for theirs--but maybe I was just so astonished it seemed the praise was greater than it really was. I never received any negative looks or comments from it, with two small exceptions. During the speech I mentioned Sarah Brady, and someone said that the negative tone of voice I used while describing her hurt what was otherwise a speech with positive overtones. In a later class, the professor asked me to summarize my main points, and someone who hadn't heard the speech sort of guffawed. The professor was very popular, had sort of a hippie feel to him, and began class by having everyone meditate, and he loved the speech too. I heard that a year or so later he brought a gun on campus to show people, so I guess he was pro-gun the whole time. I got an A for the speech, though that was sort of an easy-A class.
I only mentioned guns a few other times to Berkeley students, and never perceived any looks or received any comments, except for one time someone saw the CRPA sticker on my car and asked, "Are you a member of the California Rifle and Pistol Association", to which I responded "Yes", and that was it. This was at a retreat for a club, and hours later another club member was talking about how he had been working to start a "Cal gun club" openly, with no reservations as to who heard him. One time a girl mentioned to me that she didn't believe in private ownership of guns, but I felt that it was just someone stating an opinion with no personal vitriol towards me at all.
And for every time I overheard someone mention they couldn't believe people were still allowed to own guns, I overheard other people saying bits and pieces like, "Pre-ban or post-ban AK" or, "Wolf? You mean the green [excrement]?"