What you can do: put the messages in your spam folder. This actually does not report anything to Etsy, it merely keeps that particular message thread from re-appearing in your inbox and keeps your Star Seller score from being affected. Etsy already knows about these scams and is shutting accounts, but the scammers just make more.
Anyone who does give them their email address must be careful of emails that appear to come from Etsy. They can look very real and lead to pages that look like Etsy pages, but they are fake. Don't click on any links in emails, always check your shop for orders or messages.
