With all do respect, "generally" does not cut it for me. Some people are allergic to animals, and some people don't like dogs. They just don't belong in a confined space with people for an extended period of time. Not to mention, if there is an emergency, I don't want my escape from the aircraft delayed while someone is getting Fido out of his carrier.

I'll be the first to admit that I might be biased because I am not a dog lover. However, just because most people think animals are warm and fuzzy, doesn't mean we should all have to deal with them.

And while your animal may always be well behaved, you can't base policies on best case scenarios. If they did, I would not have to take the miniature Swiss Army Knife off my key chain ever time I travel.