I'm fine with pictures being taken! Parks encourage photography of their stuff. Flash in dark rides... it depends. Personally it doesn't bother me, because I'm with the set theory that people who pay a lot of money to have their family come down to Florida to enjoy the park, want the pictures to look back on the memories and also to brag to other people they went. I know that if I went to a theme park not in Orlando that had a bunch of cool stuff, I'd probably snap away too. I guess what I'm trying to say is, I haven't had any bad experiences with rude tourists trying to get a picture.
Though, I do find it very humorous when people take flash pictures at the Ballroom scene in Haunted Mansion... teehee.