yes the site focuses on the landfill issue and that's what we talk about on the site. I do care about the 'bigger picture' however, but in the past I ran a website and it became so 'diluted' with all aspects of green living. It got that I couldn't keep a focus and nobody took part in discussions because it was a bit of a 'jack of all trades' site.
I'm learning about the importance of maintaining the real cork trade now, thanks to input on the site. I knew a little, but not a lot - I think many of us can relate to that feeling.
As for zero waste being my sole goal regardless of sustainability, well yes perhaps it comes across like that on the site. But I'm learning more and more that we are all part of the grand jigsaw of life. As you pointed out, some will only buy organic, despite food miles, others won't use a car but fly on holiday, others might recycle everything but drive 1/2 mile to the shops. I think the key here is that we all have our part to play in a very significant way, but unless we live off our own piece of land and only move around without say a couple of miles of community, none of us are living in a truly sustainable way.
As you say there is no black and white, perhaps only shades of green

I put a lot of thought in my day to day actions, many of which I never talk about on the site; I tie myself up in knots at night wondering if I've made the right decision, but hey, I know I make a lot of mistakes too and it's through my mistakes that I can learn to make better choices in the future.