I'm hoping you aren't serious here. Even from a strategy perspective, these libertarians are far better than the average voter. They 1) Have other things they are doing to promote liberty besides voting. Considering one vote is almost meaningless, this is actually really important. 2) Will not be voting for an opponent of Rand that could actually beat him. If it was Rand versus Hillary, for example, and these libertarians voted for the Libertarian or not at all, they would clearly be better for Rand than a Hillary voter.
As for Peter King and Al Sharpton, that is way too far. How many of these libertarians voted for the 2012 NDAA? How many voted for bailing out GM and Chrysler? How many voted to make the Patriot Act permanent? I could go on for ages.