Perhaps security can be a joke, but we had the opposite thing happen to us at WDW last year. DH is a cop and will sometimes carry his off duty weapon in the typical "cop fanny pack" which has the velcro, etc inside which is obvoiusly designed to hold a firearm (but it looks like a regular fanny pack from the outside). He took the fanny pack to WDW to hold the typical sunscreen etc, (sans the firearm of course)....
Well, as we passed through security at the gates, and security was doing their typical "look but don't touch" of everyones stuff, DH opened his fanny pack for the search and the security guard reached his hand in the pack and was grabbing the velcro and said sternly "where are you hiding your piece???" "Home in Colorado" is all DH said, and the guy apologized, but it was just a bit surprising.
I am sure people bring guns, knives, whatever into theme parks. I don't feel any safer or any more in danger in WDW, DLR than anywhere else. (But from knowing several people who have been in Iraq, I know I am safer at DLR than Iraq
) Theme park security can only do so much.....if your normal spot is on your hip, they won't do a pat down of you to see if you have anything. It is your responsibility to make them aware, if needed. BTW, if you are in your jurisdiction, ect and a commissioned officer, are you allowed to carry your weapon in DLR? Also, I just gotta ask...even after 30 years of habit, wearing your firearm is, and IMHO only, a conscious action you take, meaning, you should know you have it on. How could you not realize you were wearing it?