Most behavior is viral by default, human see human do. While I agree that this extends to judgemental and otherwise unproductive discourse, usually the factors

Most behavior is viral by default, human see human do. While I agree that this extends to judgemental and otherwise unproductive discourse, usually the factors driving those behaviors in people are unlikely to be resolved by having the symptoms pointed out repeatedly. If a software module is producing faulty output, you have to fix the problem on the inside rather than simply rejecting all of the output. People are the same, except you can't directly inspect or modify their internals; you have to rely on message passing and observation, which is way more difficult. The way to make this more efficient, IMO, is to give people the tools to identify and resolve the underlying bugs in their own perception. But that's a different topic altogether.