A vote for neither is a vote for Clitnon.
Sorry but it is just not that simple. The world isn't always black and white. For Jeb and Floridians that is probably true as Florida is a toss-up. For those in solid red or blue states, their non-vote makes no difference.
If someone doesn't like Trump, then don't vote for him but for God's sake don't vote for Clinton who stands for everything that conservatives/Republicans detest. At least, Jeb got that right although it wouldn't surprise me when the curtain closes behind him in the voting booth that Jeb votes for Hillary.