I was at CF6, in fact it was my second con ever, and I remember attending the panel that Alan Dean Foster was at, we talked about Quozl and a bunch of his other books. He didn't look like someone who was 'horrified'. Maybe afterwards he just said "Enh, it's not for me" or something, but I don't think he actually ran screaming.

Furry cons are really no more shocking than any other fannish convention.

As for controversy, I think this one's a cold, dead issue, hell CF6 was nine years ago. Bill Holbrook is another GoH who was at Anthrocon this year, and I've seen him around at multiple cons, maybe he's cool with it, while ADF isn't?