I've posted elsewhere about this decision.
IMHO at this point voting for Ron can be confused with sour grapes by people who will never leave the Rs no matter how bad they get, while voting for Johnson shows we're still fighting and are willing to leave the party to do it. We have to prove that we remain relevant and that the Rs will "Whig out" by attrition, even if they win THIS time, if they continue as they have. (Isn't it amazing that we've come to a situation where we REMAIN RELEVANT by voting for a third party?)
Also IMHO the rule changes this year have made the R party a self-perpetuating clique and (unless they're reversed) killed the possibility of fixing the Rs from the grass roots level. So there's no point in sticking around - it's time to build an alternative. The Ls are already close enough to our ideology (having problems mainly with tactics) so joining them, rather than some other minor party or starting yet another one from scratch, is the logical choice.
But I have no problems with others who chose the "Write In Ron Paul" route.
Here's hoping the showing for the Ls and/or for counted Ron Paul write-ins is bigger than the O/R margin in some big narrow margin states - especially some where Romney loses. Take THAT!
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"Obama’s Economists: ‘Stimulus’ Has Cost $278,000 per Job."
That means: For each job "created or saved" about five were destroyed.