> 1. Is there any better way to express the above warning so that it'll be
> legally binding?
No. You basically cannot make it legally binding.
> 2. Do you know any lawyer in USA who would be willing to initiate
> legal action as needed, under terms of contingency payment (as far as
> I could determine, most, if not all, spammers are from USA).
No.
> By sending me junk
> E-mail messages, you agree to pay me US$500.- per message received plus any
> legal fees incurred while collecting the amount due from you - for the service
> of downloading it to my PC.
Nor is this binding.
-- Terry Carroll | "The invention provides means for continuously Santa Clara, CA | trapping sparrows and supplying a cat and carroll@tjc.com | neighborhood cats with a supply of sparrows." Modell delenda est | - U.S. Patent no. 4,150,505