To jump in with a relevant comparison: so is speeding on the highway. Is the fact that everyone does it going to deter the officer from writing your ticket?
Same thing. Everyone doing it doesn't mean that when you get pulled up on a IP infringement it's going to go away. It's not. What everyone else got away with won't help you in the least. You run your risks however you want, but they're still risks and have actual consequences. Often unpleasant and expensive ones.
They weren't making money off the IP, directly. They already made their money in hosting other people's children. What they did was show a Disney movie and get sued for it. If you dislike the daycare example because it's a business, there are plenty of google-able cases of Disney suing non-profits and school districts over illegal use of it's IP.
There was a daycare in Florida that had Disney characters painted on their interior walls. They weren't making any money off of the artwork. They were slapped with a C&D from The Mouse, and were told to remove the artwork, or else. (Admittedly, this was trademark-related rather than copyright, but it still shows how screwed you can be when you use someone else's IP.