Accounts of this type are not interested in discussion. They routinely insinuate themselves into ongoing conversations pretending to be ordinary people – giving no indication of their political position – and work, if given the chance, to derail the discussion and waste people’s time. When this tactic fails, or when they are discovered and called out, they resort to personal abuse and threats in an effort to drive people away from the conversation.
Internet trolls – especially in the political sphere – have a number of functions. They are a distraction. Trolls will engage activists in petty arguments, and, of course, the activist, taking this as a teaching opportunity, will happily go down the rabbit hole. It’s pointless. No argument will convince them of the merits of independence. They don’t even have a vote. Most likely the person on the other side is in an office in Wolverhampton following the instructions pinned to their blue cubical wall.