My girlfriend is an accountant. Almost universally, if someone ignored her degree, and wanted to run through a skills test, it'd be considered extremely insulting.
There are definitely those of us without formal degrees in software engineering, programming, what-have-you, too. But similarly, I can see some of these employers saying "Oh, you have a CS degree from Stanford? That's cool. How do you perform preorder traversal in a given binary tree? Whiteboard is over here."
I'm not sure why you're putting this out there like it's a bad thing. Surely, we want all candidates to be assessed against the same hiring standards and not give some people a pass because of the school they went to.