Yea it has.
People now meet on the internet. They become 'friends' without ever meeting them in person. This can lead to trusting a stranger who might just be out to hurt you. It gives bad people a good way to hurt and stay anonymous.
Also, instead of going outside, most people sit inside (as i'm doing now) instead of playing sports (like lacrosse... Play it it's fun) or hanging out with real friends.
It's also changed society in a positive way. Now during power outages and storms, towns can notify citizens. Also, people can talk to others halfway around the world without spending millions of dollars.