Sure but that is expensive and will likely just get a page taken down. Most nonprofits are barely surviving and not able to spend on lawyers just to make a point.

But press coverage and public outrage is free, and many nonprofits are good at one or both.

I looked up charities I support and it looks like GoFundMe is pulling in the logos of some orgs. Assuming those are trademarked, that would be a pretty simple takedown letter to send.