It must be a very recent phenomena, as the bathrooms were very clean when I was at WDW in October.
And for the people who say the blame is all on Disney, bull!
Who wants to pay what it would cost to have 10 people cleaning each bathroom? Guests need to take some responsibility for the messes they make. People feel so entitled in the parks that by spending money they can throw garbage on the ground, or smear poop all over, and they shoulder none of the blame for it??? That is crazy talk!
Guests shouldn't think it is acceptable to trash restrooms, or stores, or the walkways. And it is a sad statement on our society that people think the blame falls on on the place of business, and not on the pigs that make the mess to begin with. So many people with no respect for their surroundings.

Disgusting.