Actually wilse, in the UK (dunno if scotish law differs on this) if what you recieve is not what was advertised you can legally get out of jail free regardless of how "water tight" the contract is. And to make it even worse for the ISP, if you leave under those grounds, they CANNOT charge you a penny.
If they are being blocked as a whole by Governments, then they are not as advertised offering you the freedom of the internet...
I'll go through my magazines to find the relevant law involved as this issue was brought up in one I've read recently... Very interesting stuff!