Well, I have some idea what they do with the stinking carcases:
Earlier this year I went onto the ground to be met with something that looked like the deer equivalent of the Somme. There was a dead deer lying in the ditch, there was evidence that more than one deer had been butchered on site and the meat removed and there were several walking wounded including one with the shoulder blown out and only 3 working legs.
From the remains it looked as if a .22 had been used to attempt head shots but this didn't explain the walking wounded which looked more like something very fast but light had blown up on a shoulder blade. Maybe it was a fast .22 or maybe they were using vermin type bullets in a larger bore. Impossible to say.
Anyhow, 4 or 5 nights after they carried out this slaughter they came back in the middle of the night and butchered the carcase that was lying in the ditch! Neighbours saw the lights and report that they were only there for 10 or so minutes though they made no effort to hide what they were doing. In view of the sort of people involved I'm willing to bet that this meat was sold and has been eaten in some posh hotel somewhere. This just highlights why greed and poaching are never a good thing, no matter how many people living in housing estates harbour romantic notions of poaching, and how just one small group of people like this could put venison off the tables of the whole country.
Imagine if all the people who had eaten venison from that carcase got botulism and died? To be honest I suspect that outcome was more likely than the actual outcome which was, as far as I know, that no one died. The poachers wouldn't care and there is no way to trace it back to them but the legal suppliers of venison across the country might find their trade coming to an end when word got out that venison killed 50 people. I'm also pretty sure the hotel, say, would not admit to how they got the venison and so they would have to pin the blame on some legal venison they had. This in turn might come back to a legitimate supplier - one of us perhaps.
So, that is what happens to the stinking carcases - they get eaten in good faith by people who have no idea of the danger they are facing.