He can't stop them from doing stuff on their own as they like. That is true. However once the publish: He has the trademark, and unless this group of people wa

He can't stop them from doing stuff on their own as they like. That is true. However once the publish: He has the trademark, and unless this group of people was very careful in their wording, to only state technical facts and not opinions, he can sue them for perceived damages and based on recent action he seems to have chosen the aggressive approach, despites potential trouble for his company and product.