Can't use the exact phrase I want to use to describe how I feel about the people that let him back on social media, because the phrase could describe Kero as well.
In all reality, I am quite aware that ignoring him may NOT actually lead to him going away given how he managed to return. I am also quite aware how monstrous I'd be by advising the silent treatment. But openly condemning him, especially to his face, would likely give him more leverage at this point, so silent treatment it is.