People act like electronic devices are evil in the park. Anything becomes terrible with overuse, but I love posting pictures from my trips in real time for my family, checking other plans on my trip and keeping tabs on personal things. Like I said, anything in excess is bad but I think there is a lot of nice benefits of being able to stay connected.
It is also free advertising for Disney. The best advertising is people posting happy pictures and videos to their social networks. Many companies would kill for that type of continuous feed