Thanks to Don't link.com I discovered this little gem from the terms and conditions on the Crossrail site (Crossrail is a railway development company here in the UK).
"You may provide links to the home page of this Website provided you do not link from any source which could in any way disparage or damage the reputation of this Website or Cross London Rail Links Limited. Cross London Rail Links Limited reserves the right to withdraw its consent to linking to the homepage of this Website at any time. You may not link to other parts of this Website without prior written consent from Cross London Rail Links Limited."
That means you can't link to anywhere other than their home page without "written consent", and you can't be nasty about them as you link. So if we said their terms and conditions were half-witted, would that be wrong? Oh dear.