Or just prevent registration from all domain names used by fake email generators. It's easy to get a list of those the more popular ones are using.
I don't think it's solution. If you check list of abusers, you'll see that most are using major email providers like Gmail, Yahoo, Yandex and so on. I saw some sites don't allow to signup using certain email providers, such as throwaway Yopmail, maybe Freebitco.in are doing same.
As an aside, I do believe that anyone abusing the service forfeits the right to privacy. We plan to update our ToS soon and the draft our lawyers have written includes that provision. When it is introduced everyone using the service will have to explicitly accept that if they are caught cheating they can be publically identified by us.
I'm against all these abusers, but this thing doesn't sounds good. With all privacy stuff and things like GDPR, I don't think that it can work. And what if someone will be accused incorrectly? You will be responsible for doxed private data.