Pretty sure the government is a bigger threat. Another piece by the Guardian:

https://www.theguardian.com/world/2014/jul/08/darpa-social-networks-research-twitter-influence-studies

However, papers leaked by NSA whistleblower Edward Snowden indicate that US and British intelligence agencies have been deeply engaged in planning ways to covertly use social media for purposes of propaganda and deception.

Documents prepared by NSA and Britain's GCHQ (and previously published by the Intercept as well as NBC News) revealed aspects of some of these programs. They included a unit engaged in “discrediting” the agency’s enemies with false information spread online.

I'll take Snowden leaks over the opinion of a pedo.