No, you can always contact support and explain more clearly what happened, and to which of your games. You can moderate comments on your game pages, and if someone abused a download key, it can also be revoked. Our admins may be able to take other action as well, and suggests steps to be taken. Hope this helps.
Well they didnt buy the game, they downloaded a pre-release somewhere, then uploaded to mediafire and posted the link directly to the sales page. They had an account obv but why was a link allowed in the comments to begin with? Is there a setting to disallow them by default - so I can approve them before they go up? links are spoopy, is my take on it.