Earlier quoted context omitted.
Wow, I was just about to switch to Namecheap. More people need to hear this. How can a registrar make DNS changes without permission and blackmail? Please write a blog post about this.
"If you don't pay us, we'll turn it off" isn't blackmail.
Also, $240 because of one chargeback, and doing the above while the customer is trying to sort out a fraud issue? Neither of those sounds like normal practice for a responsible domain registrar either.
Obviously there are two sides to every story and we're only seeing one here, but that one does look pretty bad for Namecheap.