[grayclhn]

Companies already can choose to interview anyone who's taken relevant coursework, but usually can't commit that much time so they screen applicants first. If the grades in a few particular online courses become widely known for getting students interviews, I think most of us would expect cheating in those classes to rise and the classes' role as a screening mechanism would degrade.

I don't have data on cheating available, but anecdotally, I've TAed economics classes at UCSD where---routinely---over 100 students in a class would turn in word-for-word identical homework (this had nothing to do with whether students were allowed or prohibited from "working in groups" on homework, so it was definitely considered cheating in some of the classes). I suspect that cheating varies a lot from university to university and from major to major.