The basic rule of this website has always been: do not use bots. It is truly not a simple job to catch these, but they always do it in the end and people are not aware that they are caught either. Wetsuite discussed it years ago, perhaps at least 5 years ago, and then Thequin talked about it subsequently more recently as well. We all knew that wasn't right, but there have been just too many people who have several accounts and assert their innocence. Once they were banned following a significant win, they started calling freebitco.in a "scammer."
these people should be grateful with freebitco because for very long years, they have been giving a lot of free satoshis and other perks to its users. it is only fair for the site to ban those abusers. with their long experience in this business, they already know how to mitigate or prohibit such abusers.