This is why it is important to trademark names in your FOSS projects
Very few non-corporate FOSS projects would have the funds to file a trademark, especially an international one considering one can be infringed from anywhere around the world. And time spent on filing would be time not advancing the actual project, unless a lawyer is hired, which makes it even more expensive. Even fewer would have the resources to actually pursue legal action if the trademark is infringed upon. This…
Maybe $5,000 if you're talking about high-touch legal help or the trademarks are dicey.