I would suspect every search engine has this problem, and every social network has the problem WhatsApp did with trading pictures in private groups.
Calling out Bing in particular isn’t useful, but drawing attention to the problem might be — or it could turn into another repressive crusade. Hard to say.
It's self-evident that a privacy-focused service is inevitably going to attract illegal/anathematic behavior. And it's possible that after enough stories like this and "terrorists coordinated on <random E2E encryption messaging app>", average people may decide that the tradeoffs inherent to privacy aren't worth it and start supporting things like Australia's encryption ban.
