Trump has been trying to play this tune and coming off like a banjo player using a 2x4 for a pick.
In this election more than any other, I respect those who (at least at this point) plan to vote for a 3rd Party. But it's still a wasted vote. And a 3rd Party vote has never sent any message to the establishment. And it won't with either Bonespur or Hilldawg. The salient point to why most hate both is because the only message one will receive on Election Night will be, "Holy shit, I actually won? Suckers."
But even the diehards who are swearing that they won't vote for either, I think that will change when they're confronted by their own voting booth. And then they'll say, "Hell yeah, 3rd Party" to the exit pollsters.