Christians who slander other Christians, who abuse weaker Christians, who gossip and control people by accusation, unless they repent, should be unfriended, both in personal life and on social media.

Paul teaches this to his followers in 1 Cor 6.

Revilers are Christians who use words as weapons to abuse, insult, humiliate, intimidate, or slander weaker Christians (or Christians they don’t even know.)

I’ve seen this far too much, I’ve even seen a great deal of reviling routinely done in sermons. Reviling in sermons happens when the speaker goes after certain named individuals or an unnamed straw man. Very common. Looking back on certain people I should have ran the other direction from many revilers. Reviling is cruel and is usually exaggeration…if not outright lies.