I agree with that statement. I've accepted that I won't listen to any of Al Gore's arguments, as I think he's part of the problem and not the solution. He also has a conflict of interests. Taking him out of the equation entirely would do everyone, for and against, a big favor. Unfortunately, polarizing people have a tendency to keep going strong.
I personally think that the sign is funny and don't care what a private company does that much. If I don't like it (For example, if they say that we should use our unwanted children as a Sapiens veal.) I won't frequent the place. Having signs that display your feelings will attract some and drive away others, but don't be surprised when your franchise ends up in hot water.
I remember when my dear hippies in Missoula forced one restaurant to allow full breastfeeding. While personally I think that the breast-feeding years are the most attractive (Joke! That was a joke. I really don't care if I see your boobie hanging out to feed your kiddo.), I thought the better idea was simply not to patron the establishment instead of placing more laws in place.
Now, I am a tired young man and I should probably be in bed instead of up pouring my life into the interwebs.