it is absolutely the case that you are required to go after infringers if you want to be able to enforce your trademark. A trademark isn't just another word for

it is absolutely the case that you are required to go after infringers if you want to be able to enforce your trademark. A trademark isn't just another word for copyright. It's a signifier of a brand with consistent quality. If you let thousands of sites slide for a decade+, then it no longer conveys a consistent level of quality and when you try to enforce it the judge is likely to shut you down.