Then warn them as well, I do not use proofofbrain frontend and I don't know what is okay to post with proofofbrain tag. As such I am not qualified to warn them. But I am familiar with LeoFinance and the usage of the LeoFinance tag, that is why I do warn people who use it out of its scope.

Edit:

As I checked ProofofBrain has no rules, so any post could be shared on ProofofBrain.

On the other hand, LeoFinance has rules;

If you are unsatisfied with proofofbrain then take it up with the proofofbrain devs.