Web Contract (EULA) Published to World

Can I publish legal terms on the web and declare them a contract that is binding on spammers who send me spam? Based in part on such contracts, Attorney Dan Balsam of California earns a living by suing spammers and collecting money from them.

The foregoing observation is in reference to this quoted web site:
"bound by the terms of the contract"
- Welcome  to  DanHatesSpam