Since almost module entries are "crowdsourced" by users, that's not really something that can be regulated. I doubt B will get a manufacturer's account here to control their module entries either. The controversy makes $ales.

Leave the module entry as it is, and discuss the company's ethics, business practices and design theft in the forum comments. Leave it up to people to determine if they want to support Behringer's behavior or not based on what they read and observe.

The best thing to do is NOT give them free advertisement, and support the original small manufacturers with your purchases. I know I will never purchase their products ever again, that's for sure.