Yes, facebook has been the most influiential tool used by people to spread news either positive or negative, but mostly positive which greatly impact someone's beliefs and opinion. Compared to mainstreamn media, social media is quite transparent and unbiased. People get to expressed their opinion without being controlled too much by different parties, freedom of speech is well exercised thru social media and if your choosing someone to vote, it would be better to read some reviews and feedback thru facebook, twitter et al to know more about the person.