I've lived in the country all my life and have never said 'Hello Mr Magpie' to any magpie. I see magpies around my house all the time and a couple of years ago I saw fourteen of them in a tree at the bottom of my garden, so you wont catch me greeting them. I wouldn't have the time!
I don't like them; last year whilst driving home a magpie swooped in front of my car, caught a sparrow on the wing and killed it as soon as it landed on the verge. And yes, I do know it's just nature.
But, you can see I've no time for magpies.