What we can do is make sure as many people as possible know about it. personnally, I don't really donate to begin with considering both my husband and myself are unemployed, but should I find a nice-paying job that allows me to donate, I'll know to avoid CCF. If we can tell as many people as we can about it, it doesn't matter if they send an e-mail or not. What matters is that they will know to avoid this charity if they're feeling as strongly as we do here.
Ultimately, what really matters is the people helped by the charity, in this case children. Fortunately, other charities help children. If they were the only one, many things would be different. For one thing, it would be important to keep donating to them so the kids can be helped. it could also be important to make them realise their mistake, since any money they refuse could never be used to help children.
But that's fortunately not the case. there are other good charities. So let's just spread the word about them to anyone we know who might be looking for a new place to put their money to good use.