How safe is to give your personal information on websites such as facebook, my space and any others? What’s the limit for you?

 The social networks are very risky if we dont use correctly. A stranger knows our full legal name, he may find our personal information, like the DNI or our addreess. The social network that i use most is instragam, and to safe my personal information i have my acount in private mode, i haven´t accepted strangers, only i accept acquaintace with friends in common or that i know where they are from. Also, i dont accept messages from strangers and i dont have to much information in my profile. In facebook i have all in private mood. While the social networks they are to share things, we have to be careful.
I hope be safe in my social networks.