Not so long ago Anti's were targetting our vehicle if the saw a BASC, NGO,BDS etc badge in/on the vehicle. The anti's were smashing all the vehicle windows. I think BASC actual wrote an article on this very point. I would advise against such display of our associations, more especially with Burglars and the like about.
I walk the Hills, fells & mountains both in Northumberland, the lakes aswell as Scotland, and have to leave my vehicle locked, and secure, hoping that when I return it is intact, up until now I have had only my wing mirrors bent and my aerial stolen. I note that you are located in Northumberland Sylvanius, this advice is also relevant to you as I park at Thrunton Simonside, Holystone, Bolam, Plessey and every where else in between, do not give them the opportunity, it's along cold, and sometimes wet drive home when you have no windows in your vehicle!
Patrick