Maybe your right, I'm not a lawyer, are you? I agree that firms that copy the logo and silk screen it and the arduino name and their web site address are in violation of some law and should not be supported. I Just don't paint all firms not Arduino with the same brush.
Well, there's counterfeit as a general term, which would certainly encompass copying a trademark. Lots of areas where this sort of stuff happens, e.g. 'forgery', most often associated with signatures, but also applied to artwork. The issues here seem to sufficient for that label here. But I agree that the term "counterfeit arduino" is a bit more difficult, because people will use 'arduino' as general term to refer to any Arduino-compatible clone. But I surely agree with supporting the good vendors, and avoiding the ones who are engaging in bad practices such as this.