Yeah, there’s *always* a way — but one shouldn’t have to google to figure it out!
I’m a firmware programmer by trade (but a horribly late adopter of new gadgets — you should see my ten year old cell phone). People who know that I “work with computers” — typically older folks with new pads/phones their kids bought ‘em — often thrust their toy into my hands and say “can you make it work”? Very often my first question is “how do you make this app you’re in go away??!?” They often don’t know. It’s comical sometimes.
As for iOS7, it was specified in Apple's overview of the new OS (scroll down to "Multitasking"). It's fair to expect people to read the equivalent of release notes, I would think.