Just popping in to say thanks for keeping things (mostly) civil, and to remind everyone that if you don't like this policy, your quarrel is with Disney, not your fellow DISboards members.
Remember that pet-friendly hotels are not new, and not uncommon. I think everyone's aware that all of the Universal resorts are pet-friendly, but so is the rest of the Loews chain, along with W Hotels, the Four Seasons, Best Western, La Quinta, and many others. Even more chains are pet-friendly in certain hotels. So, Disney's not inventing the concept, and other hotels have managed just fine for many years without having guests mauled in the hallways, housekeepers mauled in the rooms, and smelly, flea-ridden rooms.
I'm not saying that everyone will or should be happy about it, of course it's a major problem for guests with allergies, or those who just don't want to be around other people's pets on vacation. Make your feelings known to Disney, by all means. But I don't think a lot of the catastrophes being predicted here are going to be happening.