To the 20-something guy at the other end of the Metro train today: Your conversations are not private.
Mostly there is an etiquette to taking public transportation. No matter how close you are jammed together in a bus, a train, or an elevator the established protocol is to pretend you can't see or hear anyone else -- and to act like you are in the library.
But there you go droning on and on at your end of the car. Some of us are almost asleep ... what's that? ... Catholic Church ... [drone] ... Pope is God's authority on earth, right? ... Bible. Why won't this guy be quiet? ... [drone] ... Vatican hierarchy ... [drone] ... voting for Obama ... [drone].
I don't want to be part of your loud, intrusive conversation, but you haven't given the rest of us a choice. I'm not sure what your point was, but we get your drift: you're not a fan. Only thing is, you pretty much demonstrated that you had no idea what you were talking about, but went on about what amounted to a mere caricature of the Catholic Church.
[Lady's voice] I don't mean to eavesdrop but there are a few things ...
Ah. Nice. Next time cure your ignorant bombast before you open your yap.