Actually, it is pretty much impossible for a star to be truly upside-down, regardless of what people seem to think; it is merely slanted to the side (take your pick which direction). I know exactly what you mean about people and their idiocy regarding things that they do not understand (and often do not care to learn more about).
I am honestly surprised that Britain does not have a good variety of options regarding pentagrams, with the prevalence of Gothic architecture and genre artists such as Anne Stokes.
