A comic shop (or rather, The Comic Book Shoppe) here in Ottawa is not putting Orson Scott Card's Superman comics on the shelves. Why? Because Card opposes gay rights, specifically gay marriage (in 1990, he wrote "goal of the polity is not to put homosexuals in jail. The goal is to discourage people from engaging in homosexual practices in the first place, and, when they nevertheless proceed in their homosexual behavior, to encourage them to do so discreetly.").
For context, Ottawa does not have a large number of independent places to buy comics, and The Comic Book Shoppe is certainly the best-known. As well, the owner, Rob Spittall, is making Card's work available by special order, but says he cannot in good conscience put it on the shelves.
My question is, is this right? Should the owner not sell a product because he disagrees with the author's personal views (which may or may not directly influence the work)? Or does he have a responsibility to his customers to provide these comics freely, especially given that it involves such a famous character as Superman? Are there other arguments one way or the other?
EDIT: A couple of arguments I've seen, gathered here for convenience:
Put the comic on the shelves: Karma 168 and others mentioned that if the situation was reversed (a pro-gay author had his work removed from a store because the owner disagreed with him) a large number of people would accuse him of asshattery at best and censorship at worst.
As people like Skeleon pointed out, it might not be effective; just like how that American restaurant had competing gay bans and "buy chicken for straight marriage days" (or whatever they called that event), the two sides might cancel each other out in a business sense.
Remove the comic from the shelves Most of these center around the obvious: as a private business, it's the owner's right to not sell or display a product for whatever reason, and absorb the financial loss (if any).