So would you have a problem with the exact same comments he was leaving, being left by someone who genuinely held those views? He's essentially just playing dev

So would you have a problem with the exact same comments he was leaving, being left by someone who genuinely held those views? He's essentially just playing devil's advocate which can play an important role in discussion. The number of people with enough time on their hands to adopt a fake persona will be trivially small compared to those who are treating the service 'seriously' or those who are abusing it using far easier methods.