You sound like a spanked spammer, accusing the RBL maintainer of "blocking" his crap, rather than questioning the mail admin who is using the RBL on his network. The admin, who freely chooses to use the RBL, can do whatever the hell he likes with his network, because it's HIS, PRIVATE network. Blacklists are not being imposed on anybody: you can use them or not use them as you see fit on your PRIVATE network. If you don't like the fact that your ISP uses a blacklist on his PRIVATE network that he lets you use, then you can change ISP.