I take a very hands on approach with these people. They get a mail saying one more spam from them and I will ensure I never buy anything they make again, add t

I take a very hands on approach with these people. They get a mail saying one more spam from them and I will ensure I never buy anything they make again, add them to blacklists and tell other people they are spammers. They tend to go the attack/whine route about being a struggling entrepreneur, and I try to educate. Of the ones who actually engage, about 1/3 seem to come around, which I consider a pretty good rate. (I follow through with the rest. They're just shithead spammers.)