Retarded Law?

This subject reminds me of an annoyance I came across. I'm a musician by hobby. And I also do instrument repairs here and there. There was a tool that I needed but couldn't find anywhere. Finally, when I found it at this place, I called them and wanted to order one. They asked for my business license and I was like "what the hell are you talking about, lady?" Apparently, I needed some kind of musical repair license or whatever to buy their product. After I tried to reason with her unsuccessfully, bid her good bye and hung up. After trying to dig around some more and still couldn't find what i needed, I had to call up a friend and asked him to order the parts for me. Since he's got his own business in this area, he was able to get it for me.