You're right, of course. It is easier to send out what you know rather than do the required work to take in new information. People today are trying harder than ever to find their individuality and stand out. Personally, I think the internet, and specifically things like facebook and texting have had a terrible effect on our interpersonal relationships. These things were designed to connect us, but ironically, I think most people feel more alone.
I make an effort to watch the things other people post, don't always though.