I'm glad so many people wrote in with their opinions, because I think these are things that few of us talk about anymore. Yes, it isn't worth getting too frustrated, but it sure can ruin your day when someone literally threatens to cut you b/c they feel you shouldn't be on a bike anywhere. I try to be the polite cyclist, b/c the speed-freaks out there really ruin it for the rest of us. I try to set an example. Oh and to asnwer some Q's, the cyclists stop using the bike lane b/c it really is impossible to ride on it (it's very skinny) without hitting someone. And yes to my Central Park friend, Prospect park has a nice little hill to climb, whew!
Yes, I will consider having to get up early on a Saturday and use the park, as the population increases with the afternoon...though it's much warmer at 1pm than at 8am!
I think, as with everything, people get absorbed in themselves and forget where they're at. I do it too! You're gabbing on your cell phone standing a corner when a bus can come crashing down the street--I guess we should all be more careful. Maybe a town other than NYC will be in my future...along with a new set of scenarios to adapt to!
Again, thanks for all the thoughts and ideas!

Be safe, all!