When is it ok to crochet?

Most of you reading this will know that recently I've been bitten by the crochet bug. I've made six beautiful blankets and just had my seventh order www.facebook.com/fattycraftertales if you want to see the pictures.
The first blanket was a trial one because I liked the pattern and needed to stop putting food in my mouth when I really wasn't hungry - more challenging than it sounds. If you've never tried to diet it's kind of like trying to pick up eye lashes with chopsticks whilst blindfolded.
After that I spent every stationary moment with my hook and some wool but as I repeatedly reinforced this habit, as soon as I sat down, anywhere, I started to look for my hook. Now of course I know that some places you aren't supposed to crochet; at work for example I am sure it would be frowned upon (unless I got a new job teaching crochet.... there's a thought) I'm pretty sure whilst the sermon is in full flow on a Sunday the crochet hook is supposed to stay in my bag but what about other times?
Last week I went to the in laws. I had my crochet in my bag. I left without growing the blanket because there didn't seem to arise a moment where it would be socially acceptable to get my wool out. It's wool for goodness sake not my boobs but still when is the socially acceptable time? I was sat down, I was still able to contribute to the conversation but alas my hook and wool stayed stowed.
I've figured that if you come into my home while I am crocheting it's totally ok to keep going - obviously I would break to offer tea I am British after all - which makes me think if I just walk around crocheting all the time is it ok never to stop?