As the one who first introduced campus safety as an issue at Academic Senate (1999), I can't say that much of substance has been done.
We did have one professional development session--back in 2000 or so as far as I recall--where a local law enforcement officer gave us rather good guidelines for what to do if you're held hostage. And we've got the campus safety manual--which will perhaps prove helpful if we ever get specific training in its use, otherwise I doubt that many have read it and fewer still recall much of it.
Oh, and wearing our ID badges was supposed to promote public safety. I guess identifying the likely victims of violence makes law enforcement's job easier--in that they can identify faculty and staff quicker after a crazed student (not wearing ID) opens fire randomly. Past that, the only thing that wearing ID badges accomplishes is to make us look more like we work on the floor at Wal-Mart.
So how about some specific suggestions for improving campus security? As in the thread on saving money, I'll start.
1. Professional development should include safety training at least annually. This training should include practicum and not just lecture.
2. Every classroom should be fitted with a simple single-throw deadbolt lock on the inside of its doors. If gunfire breaks out in the hallway, the instructor can then secure the door and direct students to huddle together in a corner that's protected from fire.
3. Every room with an exterior window should have its room number displayed visibly in one of those windows. That would allow first responders to find almost every room in the building without (for example) having to figure out that the 200 wing is not between the 100 and the 300.
All of those are inexpensive options--then there's a fourth that's been brought up elsewhere:
4. Configure campus phones so that the specific campus phone is identified in every 911 call.