There's a special circle in hell for people taking calls in a crowded bus. Though to be fair it's several layers above the circle for people taking calls in a bathroom stall.
I'd hardly call my calls intrusive, a simple "What's the problem" followed by an explanation and a cursory "I'm on it." is usually all that the rest of the bus hears. Are you all really that precious?
People shouting in to their phones however... I feel like it's the kind of person with zero self awareness or care for their external, social impact that ruin it for the rest of us :P
