How much social networking affects you

For me, any Internet ready device that I own must have easy access to
Facebook and Twitter ... It's not just about me updating my status ..
It's more of keeping myself up to date with everyone else...

I would have thought that MJs death was a prank when my sister told me
about it... But when I saw everyone on both FB and twiter updated
their status with the big news , I know it's true ...

So how much does social networking sites affect u?? In what ways?