Frankly the only time I see any real mistletoe is in December. Even then it is mostly artificial. Is it hard to eradicate? I know eucalyptus had many medicinal properties. While mistletoe only helps to pass a cold or the flu (via kissing).
But it's a nice way to spread disease, Ancient. Or at least, I think I remember it that way. I don't know about eradicating it on a wide scale; not so hard to clear out of a garden though.
Hmm never thought about it that much to be honest.. I suppose it is a parasite, but doesn't seem that damaging a one.. it looks interesting, which is a point in its favour.. Mind you I did learn something here. I never knew it liked eucalypts.. I thought it only liked apple trees and poplar.. so there you have educated me :)