Is IT obnoxious to tell acquaintances and strangers (unsolicited) that you will pray for them.
You can say it if:
A. You are joking. Example would be if I said something really nasty/sick/wrong and you said that to me.
B. If I'm sick.
C. If I'm going to war.
D. If I'm going to the Olympics
If you say it in a creepy born again kind of way, no its not right.
PS. It doesn't matter since God is going to send you to eternal damnation/flames/hell/fire if you yourself don't blindly accept the story of Jesus 2000 years ago. If you don't swallow that story from MAN, then God will send you to hell. So they scare you into believing too. Better safe than sorry, so even though you don't really "believe" it, most say they do just to be safe. And they don't question it.
So it doesn't matter if you pray for them. Better to explain your silly little story and see if I buy into it.
For the life of me I never understood how anyone who heard the story bought it. Its like believing in Santa or the Easter Bunny. Come on humanity. Wake up.
Maybe the Hindu's or Psyentologists have it right.