Really? I think your example is a little ridiculous. We aren't talking about new or used here. But to keep with what you're trying to say, this is far more akin to somebody putting Farrari emblems on a converted Pontiac Fiero and calling that a tribute. Which is more an insult to the manufacturer than a tribute.
But to circle back to your claim of diminishment, buying a used car of any brand is still support of that brand. Where as, actively seeking a blatant ripoff is a detrement and only serves to hurt the brand you claim to admire.
And making more and more cheap knockoffs readily available only exacerbates that.