The posters I used were copied and modified from one I found online saying "Attention Criminals: This is a GUN-FREE ZONE. All law-abiding students, faculty, and staff at this institution have been disarmed for your convenience."
To be honest, my recollection is somewhat rough - it was a couple years ago. However, I do remember that in my meeting with the Dean of Students he was adamant that I stop posting these signs because they were posted "against the sign guidelines". The school had very strict sign guidelines regarding where signs could be posted and that they needed to have contact info on them. My argument was that I posted them immediately next to public safety notices that also lacked contact information, and that these, too, were a public safety notice. He inquired as to my reasoning for posting these, and I explained that the reason I posted the signs is because the President of the college had decreed that the administration would not issue the documentation required for CCW-licensed students, faculty, and staff to legally carry on the campus. He indicated that he would be interested to see what happened if I formally requested such documentation, but I never had the opportunity as I finished my degree shortly afterward. I agreed that I'd stop posting signs against the sign guidelines.
In my meeting with public safety, as I mentioned before, they claimed that they had been "dedicating all their resources for the past week to finding out who was posting the signs." (I thought - if it took all their resources for a full week to figure out who was posting signs, then God forbid they try to figure out what to do if there was a serious situation on campus and they're not even allowed to carry guns themselves.) They claimed that they were worried that it "might be a threat" as one of the professors had received an unrelated death threat shortly before I started posting those signs. They were "relieved" to figure out that it was just activism. I had a brief discussion with the guy about the fact that with all the recent shootings (especially since I went to an engineering school) its ridiculous that the only people allowed to defend themselves on the campus are criminals. His response was something to the extent of "I can't disagree with you..." but he didn't seem to want to say much more... I suspect it was because the administration is known to come down pretty hard on faculty and staff dissenters.
All in all, I had no penalty (though I technically did violate the sign guidelines - which have helped earn the school a
red rating with FIRE). They just were happy to know who was doing it and have me stop I guess.