That's a kind of interesting point. I think, and I can't really say I speak for anyone but a few people I know well, that the only people who are annoying that way, are the people who try to tell us what we're doing, how to do it, or say they support us out of one side of their mouths, and then bad mouth what we're doing or have done out of the other.
I know that on the way back from Afghanistan I was humbled and thankful for the many expressions of support that were given by total strangers. When I came home I recieved total and unreserved support from people, I wish that I could say the same for the men and women coming home from Iraq these days. They've been at it a lot longer and have IMHO worked near miracles in the not even two years we've been there.