As a CM who works in the parks (Backlot Tour @ Studios!) - I can attest to the increased security for cast and guests alike. From what I have heard, which is what our cast were discussing, is that security somewhere on property failed an audit in which a man brings an unloaded gun through security attempting to not get caught. He obviously works for Disney so it's safe, but he was not caught, and upon making it through the turnstiles into the park, it was obvious that Security had failed their audit. After this, they began checking bags much more thoroughly than before. I carry a backpack to work with a change of clothes, my lunch, a book, and a few snacks, and usually have no problems, but recently I have started taking my lunch in clear bags because they've made me open the brown bags I used to take my sandwich in.
I feel more secure, yes, but part of me thinks that if Disney Security had been doing a proper job in the first place, there'd be no need for the recent increase.
On another note, I wouldn't doubt if Disney added metal detectors to its parks in the coming years, but I don't think they'd look like any metal detectors you've seen before. They would most likely be themed into the turnstiles and you wouldn't notice them unless you got caught with something.
