Massive spam accounts (Patreon)

I noticed that i've got a lot of $50 patrons with very random names and mails this month, and im not the only one getting those false pledgers, a friend got a very exaggerated amount of those spam accounts. The problem with that are the milestone goals and the rewards of it, those say that the creator reached the goal, but the true that he/she haven't because there are a lot of high false pledges :/.