BUT, I think a Theme Park attack is too predictable. I don't know, I'm sure it will bother some people, and change their minds, but it isn't changing my views on family vacations, or traveling to Theme Parks.
I think Brian is correct though. They would most likely go for DC, New York, Vegas, or California before a theme park in Florida, or specific others.
Forget Gatorade & toothpaste. They don't do body searches at theme parks so it would be a simple matter for a terrorist to carry explosives on their person. They only check bags and even have a line you can go on if you don't have a bag to search - imagine that.
Believe me, I'm fairly certain that even if theme park execs spring for beefing up security, the terrorists of today could still pull a fast one on security guards if they wanted to, don't you agree? Oh, it would look great in the media, "Disney steps up security promising a safer vacation for you and your family." They'd love to use that to justify the 50% inflated cost of a ticket.
Extreme measures take extreme dollars. I'm not willing to pay an exorbitant rise in ticket prices to see the mouse just to ensure that the family of five riding Space Mountain next to me didn't bring a sports drink and a tube of toothpaste into the park with them while there were no measures taken to ensure that the group of five without any bags to check weren't under even more suspicion than them.