If you enable the option Show “Report abuse” link that you can find in the section Frontpage in the plugin option panel, users will be able to report an abuse concerning a specific product.
This option allows you to enable this feature either for all products in your shop or for those associated to a vendor only.
In product detail page, you will see a link: if you click on it, a popup will appear to users with a form for the abuse.
This will generate an email that will be automatically sent to the shop administrator.