Black Mirror : Hated In The Nation logistics question

Hated In The Nation logistics question

I seem to recall that Twitter has the ability to ban hashtags if they see fit. Certainly after the second person got "droned" and the police were able to piece together the method and the mechanism of the "contest", wouldn't the government immediately contact the social network and relay the information? If this happened in reality, Twitter would just ban the hashtag, so why wouldn't the corresponding social media company in HITN? Not that the rest of the episode wouldn't have played out the way it did (which itself was IMO heavily contrived--the Asian agent never would have just clicked the button to reactivate the bees), but it's still kind of a plot hole if you ask me.