I think sites like instagram are great with when not over done. I love it during the summer so that I can see what everyone is up to and see how life is going for everyone.
During college it's the same thing. Now some people obviously over do it, but the majority of the people who use it just glance at it when they're bored, in class, and just looking for something to do. But for the majority it's a very small part of our lives and it actually makes social interaction easier.