From the article, this is the scary deal, notwithstanding the Electoral College, if this goes through America as we know it might be really screwed:
Lessig said he hoped the controversy would encourage more states to adopt a system in which they would assign all of their electors to the candidate who wins the nationwide popular vote for president.
More than a dozen states have signed an interstate agreement to make the change. It would take effect once the participating states represent at least 270 electoral votes, the minimum needed to be elected president
(my bold)
In other words, as I understand it, the votes of certain folks will be overwritten by the popular vote. The fact they assigned Electors to another candidate will make no difference whatsoever.
