Disney security can't even respond promptly to or once on scene actually handle a fight.
What do you think will happen when an active shooter shows up, whether they are Angry White Boi or a true Jihadi?
FWIW, the nationwide failure rate for contraband getting through TSA screening hovers somewhere in the 60 percent area. Some airports have been as high as in the 90 percent area. I have no reason to believe that Disney security is miraculously effective at screening out weapons.
Just another reminder of why there's tons of places to visit and spend your money other than these traps.