I looked at the place on google maps. There is a row of shops with an awning running across the front of them all. The name is also on the awning, but the complaint seems to just be the window art, so I don't think it's the name they are objecting to.
It is the only shop with painting on the window, though, that I can see. The painting on the window on google maps is not the same, so it would seem that the window was painted previously, too. I wonder if they had a problem with that, also, or if the complaint just came up with this new window art.
ETA It appears one of the owners is named Mike Diamond and the other owner had a shop previously called Sacred Skin.