I dunno - I think the victims in a lot of these cases aren't stupid. They can't contact the seller because they bought it from 'some guy' who's disappeared into the night. They know they've been had and are trying to get a knock-off board working at the expense of [the time of] someone completely unrelated to this.

It's pretty normal for the first port of call / warranty claim for a busted item to be the dealer that sold it to you.

I absolutely agree that engaging with these people beyond "we added checks to ensure your board has the RAM it came with, and this one failed" is a waste of time, but I think that at least providing that level of response would be much more aligned with the image they're still trying to project than just stonewalling entirely.