Reporting Fake Reviews - best way?

So friends, anyone know of a good way to REPORT all these fake reviews? If I see any I’ve started to click the ABUSE button, and leave a comment along the lines of

FAKE REVIEWS - these 5* reviews are fake, and intended to make you feel confident about buying this item.

I know we don’t have the time to police Amazon, but I try to do what I can - if Amazon added a REPORT REVIEW button?