Social media conspiracy theory

One very worrying side effect of the algorithms social media/networking sites, like Facebook are using to tune your newsfeeds and timelines for best impact of advertising is that they’re boulstering conspiracy theories…ironically enough. At least that’s according to a feature on Fastoexist.com. But, how would we know and how could we stop this happening…are they really manipulating us like this…pass my tinfoil hat would ya?