Mister Cinders

"Trademarks and design patents, almost certainly have been violated, though the damages to Taser International Inc seem to verge on the insignificant, and the matter could have been cleared up quickly with a DMCA notice."

Except DMCA take-down notices address only copyright infringement. Linden might have responded to a take-down request, but the DMCA does not really control.

Also, if Linden is the actual seller (having acquired XStreet SL) then sending a take-down notice would not be appropriate because they are not an ISP. They are the content provider.