We will eventually be able to do the same in humans by transplanting the head of a person dying of multiple organ failure onto the body of a vegetable. Lots of weird and bizarre stuff is going to happen and people are just going to have to get used to it. Just as the first small pox vaccines were made from the ooze juice of cow sores but now we dont tell you that, we just say its a 'vaccine' and leave it at that. Get over the ick factor or commit suicide while you're still ahead. Billionaires and millionaires will be able to practice whatever type of science they want such as growing a twin to harvest organs from or for a head transplant to extend their lifetimes to immortality.
Nothing can stop the rich or grassroots because they can both cant be tracked.
You can only make examples, slow things down perhaps, but nothing stops the progress of science.