I'm not blaming Disney or security for this. They do try their best I'm sure and people generally looking for something to blame instead of looking at the actual situation and how we actually do affect others is why this continues.
Things will happen, but people are expecting DL to have robotic control over everything. We don't need to be patted down, escorted to the park, checked by every pocket; instead, people need to be more aware of their own actions. I'm kind of glad Disney treats it's guest like guest instead of criminals, as I'm hoping they are aware (as OSHA pesters them a lot) that a few idiots shouldn't ruin the experience in general for guests. Bad things will happen, it's life.
Complaining about how security didn't do their job is why we just get longer security lines and the same problems...
It is sad how some people's journey has lead them to always having to carry a gun to feel at ease, but it's the way it is. Common sense for some is a unknown for other people, he clearly wasn't thinking bringing a gun all the way through, despite whether he felt he should bring it or not.
This was rare incident though so the need for signs in general seems pointless. Even with signs or metal detectors, no doubt someone will bring one in somehow. Should we hand out a list of rules to each guest or put metal detectors when entering each land?? Apparently, the conclusions to these human problems seem to head that way.