Maybe so, I don't know - at the moment to me this is just another guy driving a Blue Ford, hardly enough to brand them either a miscreant or having a valid patent claim. I think sometimes people's frustration with the complexity of patents derives from the complexity of technology, and any time we see something we don't really understand or can't differentiate from another technology we may understand better, we leap to an assumption of obviousness and begin to ascribe motives. To me everyone in the field of PLBs are driving Blue Fords. I wish they would all get along and cooperate on standards and such, but sometimes like in many other fields, that ain't gonna happen.