The funny thing is, well actually it's not funny .. they know that in the UK we like to see before we buy, but they've decided to bring this rule in as too many people are dealing outside of ebay and they are not getting their fee's!!
If caught giving out details then ... and believe me this is true ... first time you get a warning, then after that you get suspended for 3 days, then if you still give out address details they can close you're account down even if the item is still clearly visibly available for sale on your listings page!!
They are also taking final value fee's if the item that the address was requested for is taken down from sale .. yeah I know it's getting ridiculous, as if they don't screw enough money out of us with all the different fees imposed already!