The problem with faking chips is that the victims maybe out of a warranty claim later when they find a problem. Also there might be subtle differences which will only be found when in full production. For a cloned JTAG debugger the risks are lower since they are used in low volumes. Personally I think they it is okay to clone or reuse chips but don't claim to be the original manufacturer. It is quite easy to relabel chip with your own imprint.