Yes, it does. I think social media is probably even worse than TV. The echo chamber effect is immense. Add to this targetted advertising of pages/sites you 'might like' based on what you have already viewed... and it exacerbates the problem. We risk becoming isolated on islands of discussion, forever talking only with those who already agree with us.
It's why I like this section of the forum. You come across a wide range of views, some of which you may think are absolutely f---ing insane... but it forces you to provide evidence to back up your own position, and forces you to determine the veracity of that evidence.