I sign only if it's a widely known and used service with a good reputation. Otherwise, I read the fine print. All of it. And, if I don't understand something, I don't take the risk.
If you don't understand your end of a contract, could you be held to it?
If you don't understand it, then why would you sign that you DO understand it?
We are not interested in practicality here. This is about theory.
The peson signed the contract because they would be entitled to something from it that they wanted.
You Lose! Good day, sir!
[youtube=425,350]VDW0ZnZxjn4[/youtube]
http://www.youtube.com/watch?v=VDW0ZnZxjn4