This is exactly what Peter Schiff was talking about in his radio show by the way. He said that he would prefer any anti-Seitic business owners in New York to put up "No Jews Allowed" signs so that he and all his friends would know that place was anti-Semitic and would choose not to shop there. Under current laws, racist business owners merely hide their racism and still benefit from the business of those they are racist against.
Ok, while unpleasant, this makes a lot of sense. Like, I don't like racist people, but I'd much prefer racism to be communicated in words rather than fists. I'd like there to be no racism at all, but unless I master mind-control and can take over everyone's lives before Obama can, I'll settle.
I have to say as well, this topic has made me a Peter Schiff fan.