@Stuart Castle - Re: Mass e-mail != Spam
"The problem there is that, in my experience, people do not read what they are signing"
Actually you make a good point there.
Whilst making an edit to my site, I once accidentally broke the link to the Terms and Conditions page from the checkout and it stayed that way for a couple of months.
Yet *everybody* when they ordered, ticked the box saying "I have read the Terms and Conditions" even though it was physically imposible for them to have done so...!