I didn't know that any were out loose and I can only assume that others wouldn't know that either so why would they automatically think that it is a prop. Honestly I have been on the island once and that was in 1983, so I would also have been concerned had I been there. Couple that with the fact that there is more than one way to get in the park, without going through the front gate and you have reason for panic. I'm glad it turned out to be nothing, but there is no reason to think that it couldn't have been more serious.