There are lots of other cheap filters that companies do not use. For example, "Have you read Ayn Rand?" This question may well have better predictive power than a degree. And it's not hard to verify if the person is lying about whether they've read some at all.
Or, "how many blog posts do you have about programming?" Again this is easy to verify.
Or, "how many blog posts do you have about programming?" Again this is easy to verify.