I don't like being dogmatic about these things. Like any sensible engineer (I'm not a sensible engineer!) I feel diffident about saying: "Look, there's no way this can cause harm!"
But
the mast hysteria developing about mobile phone masts means that even people like me (and you?) will now be asking: "Should I allow planning permission if asked?"
And the answer, definitely, is: "No! - my house will drop in value by a quarter to a third!" - not for any known rational reason; just because other people will think "His house will drop in value by a quarter to a third." And if they all do, it will.
Is there a way around this problem?
Threatening to burn a church down shows just how extreme the fear is in some minds.