Alright, so apparently Facebook can spread moods. To fact check it, I Googled it and all that came up were about a dozen links to the same article on different sites. There is also a study. I couldn't tell whether or not it was true exactly but I assume so because, again, its on about a dozen sites.
Anyways, here's the site address. I couldnt find the link so here it is: http://www.bbc.com/news/technology-26556295