Let's see, a few observations.
First, when we were at the parks during spring break last year, we had our camera bags open with the cameras out, our belt packs open, all the compartments on the backpack open, and breezed right through all the security checks. They even thanked us for being so cooperative.
Second, let's look at the terroist himself. Current dominant profile based on actions against the U.S., white male of middle-east ethnicity, age 18-35. Don't think for a moment that Disney doesn't profile. And all profiling does is increase the focus of surveillance on a selected individual or individuals. Like watching someone more closely is a big violation of their rights.
Third, based on the above, anyone stop to think that having checkpoints before walking into the park is a good way to slow people down, and make some observations by people a little more trained than the checkpoint CMs?
Fourth, I don't prefer the two alternatives to what Disney is currently doing. One alternative is no checks at all. The other alternative is metal detectors, emptying pockets, removing socks and shoes, and if a suspicious bulge is seen (minds out of the gutter), a pat down or *gasp* escort to a secure area for a strip-search.