Yes, it may be impossible to create a filter to detect new (previously unseen) copyrighted products on the platform. However, once a copyrighted product has been through a dispute and the owner has been established by Amazon - it's completely feasible to programmatically detect and flag this product once it re-appears under other accounts. It would actually be quite easy, given Amazon's technology expertise.

From reviewing the thread the artist posted, it appears that's why he's frustrated - that fakes keep re-appearing, and Amazon is asking him to jump through hoops again, even though his authorship had been established.

So, no - I don't feel it's reasonable to ask the author to enlist people to help him police the marketplace, Amazon can easily solve this problem (future infringement) with technology.