There's quite a difference between one person making a decision to not vote for Clinton in the ballot box on their own - Quite frankly in a state like Washington I don't care if he writes in Bernie Sanders or whatever his choice might be. But he's going to be sent to the electoral college - he should respect what the voters of his state says or resign.
More proof the electoral college is garbage.
If we don't allow electors to vote their conscience, then there is no point to the electoral college - every other argument for it has an obvious counterargument.
This is of course the position of every nonidiot.