I think, to put it in perspective Reiver, that if you met either MacB or Greg out on a walk with your dog, you'd probably all exchange pleasantries, maybe chew the cud and nothing more.
I also think that it's the minority in most things which give us all a bad name. As a dog owner, badly trained pets and dog poo irritate me as much as anyone else. Red light jumpers reflect on us all, out of control screaming kids reflect on all parents and so on up and down the scale of things that we do and others don't. The trick is not to take it personally and just step back.
I know from your posts you're a reasonable bloke, I know from Greg's he is too and I know from MacB's that......OK we'll leave MacB out
And as for that Brompton fella........