The only problem I have with security lines at Disney or any theme park is that, as someone mentioned, it would be very easy for someone to carry something in on their person. The look-through that they do on pocketbooks and backpacks are perfunctory, for the most part. Several people in this thread mentioned putting all their stuff in pockets, so they don't have to go thru the "search" line ~ unfortunately, many items that can be used to harm people -guns, knifes, even explosives- are small and portable. For example, I carry a set of darts in my pocketbook, which no one at Disney, Busch Gardens, Sea World, has even noticed; they're in a slim black case at the bottom of my pocketbook, with it's black lining.
So, I pretty much look at those lines as something of a waste of my time (and it's usually more than just a few seconds, depending on what time you go in), and as it's also been noted here, security certainly doesn't end at the entrance ~ and that type of security is probably far more effective. Strangely enough, if the search was more thorough, I probably wouldn't have an issue with it, because then it would seem to make more sense as it would be more likely that weapons or dangerous items would be found. I think before I gave a definitive yes or no, though, I'd like to see the parks' statistics ~ just how many items have been found at those security searches, that aren't false alarms or smart*sses like the idiot that was detained for joking about a bomb.
JMHO...