For Sophos, Lisa Vaas assures us that Over 75% of people lie on social media. Apart from the fact that I try to avoid believing in surveys on principle, I have to wonder how far you can trust the word of people who admit to lying. (I think the Liar Paradox probably applies.)
Mind you, there are those who think it’s a good idea to lie to Facebook et alia about personal data you can’t trust them to keep to themselves. But that would be one for another blog.