British game retailer GameStation (as an April Fool's joke) added the following into its terms and conditions:
By placing an order via this Web site on the first day of the fourth month of the year 2010 Anno Domini, you agree to grant Us a non transferable option to claim, for now and for ever more, your immortal soul. Should We wish to exercise this option, you agree to surrender your immortal soul, and any claim you may have on it, within 5 (five) working days of receiving written notification from gamesation.co.uk (sic) or one of its duly authorised minions.
The ToS went further:
...we reserve the right to serve such notice in 6 (six) foot high letters of fire, however we can accept no liability for any loss or damage caused by such an act. If you a) do not believe you have an immortal soul, b) have already given it to another party, or c) do not wish to grant Us such a license, please click the link below to nullify this sub-clause and proceed with your transaction."
The retailer advised they were making a point that no one reads online terms and conditions and that they would not be enforcing rights on customer souls and would contact customers to advise them so.