Silly legalese

Just one example of the dubious legal language I keep finding in e-mails:

To access this e-mail, our website and our services YOU MUST AGREE that the contents and our relationship are governed by the law of England and Wales. If you do not agree, you are not at liberty to proceed beyond this point. If you do proceed, that is your agreement to this statement.

And if I don't agree to be governed by the laws and England and Wales? How are you going to stop me proceeding beyond this point?