It sucks.
And, to me, the thing that sucks the most is you never know how it's going to hit you. Most of the time, no problem. But, there have been a couple of times that it tore my heart out. I think when it hurts the most is when you can tell that it's hurting your friend as well. And, yes, I'm going to call them a friend, because if they didn't still care for you, then you wouldn't see the hurt in their eyes. Sadly, they still believe that what they are doing is what is wanted by God. So, then you feel crappy about the shunning, but even worse because you know that your friend is still stuck on the inside. And, the only reason that they won't talk to you are because of some old guys in Brooklyn.
As for the people you didn't care about to begin with, eh, whatever. I think I'm going to try Avi's suggestion and sneak up on them and shout "Boo!" then watch them fall over themselves to get away from you.
CountryGuy