The trouble with the UK is it is just too small a place for all the people that live there. I am sure that this sort of thing is the result of ever shrinking personal space.
I am familiar with dealing with the 'antis' now, but I can imagine they can be quite intimidating if a first time Jeeper is confronted by one or more face to face.
I drove through the City of London earlier in the year. My Jeep is usually covered in mud and it leaves Jeep droppings wherever it is parked. I had a driveshaft u-joint give up on me and I had to pull over at the side of a busy city street to change it. A huge crowd of cyclists on some charity event rode by and I was surprised to hear comments of praise like "Cool Jeep", "Nice to see one used as it should be". Not one of them said anything negative, a few even stopped to offer help. This was certainly not the reaction I was expecting.
I guess there are extremists in all walks of life, spreading their propaganda, trying to impose their will on others, some are even in government. Being born a British subject, I don't have the good fortune to enjoy a constitutional right to the pursuit of happiness, but it doesn't stop me acting as if I do. If I catch one of these 'Stop Urban 4x4' idiots putting one of their fake tickets on my Jeep they will land themselves a $370 fine for littering.