Diploma mills exist, like these in this wired article.
Will employers be able to SELECT candidate FROM career_stack_overflow WHERE diploma_university NOT IN (SELECT name FROM known_diploma_mills)?
The possible existence of diploma mills throw the entire diploma column's data quality into doubt.
EDIT: I remove the word responsibility. The libertarian tangent this question went off on was entire unnecessary and uncivil. If SO Careers doesn't have a policy on people lying on their resume, what good are they to anyone?