😅 I think we're in trouble if we're comparing human beings to roaches. Dehumanising people is so easy that it's often largely unconscious.
And yes, while yelling at people and attacking them certainly will influence the audience (assuming there is one, I don't think most flame wars on Twitter or in Medium comments have much of an audience), it's worth asking whether you're influencing them towards or way from your point of view.
I see a lot of online activists just making people on their side seem violent and unreasonable.