I never bought a mobile until I needed one for work a short few years back. I admit I find it convenient but I don't bother answering or making calls while moving, foot or vehicle, or in public, I see no reason to share a personal call with the general public. I've become a tad unpopular with my friends and family too, if they attempt to use theirs while with me, I just take it off them and hang up, telling them if they want to be rude to me then they can wrack off.
Now if their phone rings they either ignore it or take off running, lol, and that suits me fine. Mostly though they just turn them off first, as I do, it's the polite thing to do in my book.
If I happen to walk past someone jabbering away while they're walking I'll usually yell at them suddenly as I pass, I figure I'm actually doing them a favour as it focuses them on their surroundings, and amuses me greatly in the process.
The weird thing is, some people call me arrogant, but what would those fools know anyway?