This whole discussion has been fascinating to read and ponder upon- and it's a question that I have considered myself. There probably is no definitive answer. It wouldn't occur to me to ask for my money back, no matter how violently I disagreed with the message. I might be disgruntled that I had wasted the money or that I had inadvertently supported the offensive cause but I think I would figure that by word of mouth I could negate its effect. :)

However, Greg appearing in the thread and giving his view wraps it up very well. Thank you.