I tend to have a very 'mind my own business' attitude in general, but with 5:2 I do find myself wanting to spread the word. I'll tell anyone who's interested or asks me how I'm losing weight. I've actually bought Dr M's book for 5 of my friends and family.
What I find interesting is the level of resistance to fasting that I encounter. Reactions like - Oh no, I couldn't do that. Or - I tried it once and it's not for me. Fair enough - as someone said, it's not for everyone. It's just, it's worked so well for me and it's such a flexible WOL with so many variations, I'm sure most people could find a version to suit them with a bit of experimentation.
Oh well. Horses for courses. Live and live. And all the other platitudes.