Given that these copycat extensions usually aren't giving you a way to find their creator - good luck with the legal system. And even if you can find them, what

Given that these copycat extensions usually aren't giving you a way to find their creator - good luck with the legal system. And even if you can find them, what will you do about them if they are located somewhere in China? The legal route is only good enough to force Google into removing infringing extensions. For you, it means more effort and money wasted. And these malicious extensions get more time to catch unsuspecting users. Of course, after being taken down they will immediately resubmit their extension and you start from scratch. All while Google has a way to report such cases but won't act on the reports.