I actually like cats Orang - as certain Urbanites know I tend to get on well with them too - I just like birds and value the native wildlife more. There's a nasty assumption that letting cats out is the way it should be and damn the consequences, which seems selfish, irresponsible and lazy to me.
In the countryside that's more acceptable, but in a busy urban landscape letting huge, ever increasing numbers of predators out to do what they please strikes me as daft, particularly with all that traffic around and wildlife already in decline. It's something which depresses me slightly if I'm honest - it's the sheer thoughtlessness and denial of it all.
By the way Pogo, here's that article from the Guardian for you, complete with quote from Chris Packham. It's encouraging cat owners to fit 'high visibility' bibs to the cats to help save local wildlife.
http://environment.guardian.co.uk/conservation/story/0,,2088668,00.html
You can apologise for the 'your claim is shite' comment any time you like btw...