Anyone that would want to own such a thing probably cares about what it points at so they're more than likely going to possess the illegal content as well. For

Anyone that would want to own such a thing probably cares about what it points at so they're more than likely going to possess the illegal content as well. For example if you own an art NFT that is on IPFS you probably want to pin it yourself to make sure the link doesn't rot whilst you own it. Then some images are actually on-chain so the NFT and a copy of the picture exist together. That said there is an explicit link between the NFT and the child sexual abuse material so I'd presume there is a legal case that keeping one is keeping the other. Like if you made sure your hard-drive was totally clean but kept bookmarks to abuse material. In the example of cocaine there is no explicit link but if they could connect the NFT to a criminal enterprise then I guess there's likely some laws around profiting/handling gains from criminal activity.