A very wise person sent to this me privately. I'll let that person's words stand for mine as well.
I've been thinking about it. If someone came into your home, spent time telling you how terrible you were, ate all your cookies without asking, and then took a dump on your couch before leaving, what would you do? Because you seem like a pretty nice person, you may invite them back a second time, thinking they had a bad day, maybe you got off on the wrong foot, etc. How many days in a row would you go before just saying, you're not allowed here any more? I'll tell you, I've never had anyone come to my blog and act rude on a consistent basis. I'd probably find it incredibly funny. But the minute it went from amusing me to annoying me, I'd never allow another comment. No explanations, no apologies.