It's not "my solution." It's an observation about what actually happens in the world, in practice.

One important aspect of what I described is that it requires an awareness of when one's beliefs are out of line with widely accepted positions. That awareness helps avoid pointless and unnecessary conflict, and may also cause one to reconsider the specifics of one's beliefs. Lacking that awareness is likely to lead to trouble.

When someone finds themselves defending child predators, it suggest that they are severely lacking in that kind of self-awareness. Social shaming in that situation is not unreasonable, and may help the person improve their understanding of how their beliefs fit into the world.