The following article discusses the importance of privacy issues while using social media in 2014 but are still very much a problem in 2015.
In all the articles I have researched on privacy issues while using social media the number one thing to always be aware of is to be very diligent while using all social media sites as not only are scammers and fraudsters looking to steal your identity, businesses big and small are also looking for information on you so that marketing information can be sent your way.
My advice to stay safe online while using social media is to change your passwords frequently and never give out more information on yourself than is required to log into the accounts you wish to use. Even changing your birthdate by 1 day either side of your real date is a good idea.
Here is a link to one article that I found interesting.