Social networks

Everybody hear bad things about social networks and good things too. So the question is: Are the social netwoorks great or bad?

I will not response this because everybody has his opinion and he and people can feel offended.

There are people who think social networks are save but it isn't true because we know when you delate a file this one is saved in other computer and you don't have the control about your photos. Anoter bad point is cyberbulling or symilar things. 

But there are the people who only thing it's a social network to be connected with friends of arround the world and share what are you doing and more. 

And you... what do you thing?