Most of the problem is wholesale swaps of products - not minor edits. Allow minor edits, but prevent wholesale swapping of content/categories/descriptions/etc.

Most of the problem is wholesale swaps of products - not minor edits. Allow minor edits, but prevent wholesale swapping of content/categories/descriptions/etc. Limiting edits, showing product history, or removing reviews on edit (or some threshold of content change) would be an easy place to start.