Historically Libertarian candidates have declined federal campaign matching funds even and especially when they qualified to receive them. The money is consider stolen taxpayer money. We can attend public schools and drive on street paved by the state, but we draw the line at receiving an outright grant.
Likewise, I never check off the box on my tax form that asks if I want $3 to go to the Presidential Campaign Fund, since I know that nobody that I plan on voting for will accept it. But I then thought that no matter what I do, they are never going to give me that particular $3 back. So why don't I politely ask them to use that money towards a cause that I support, namely to go towards electing a Libertarian?
Let's hypothetically say that 2008 will be a tight 3 way race between Hillary Clinton, Condi Rice, and Trey Parker. (No, that's not an endorsement and I don't think he's running. I put that there for comic effect.) This is how it will work. The national LP website www.lp.org could ask members and supporters who still pay taxes if they plan on checking off the PCF box when they fill out their tax form in 2009. Let's say that 4,000 people say that they will. Trey Parker would then only accept $12,000 in campaign matching funds. He would only be accepting the $12,000 that taxpayers voluntarily said should go to him. This would not be stealing taxpayer money. It would be asking for it back.