The only thing I can figure is that Badnarik is a publicity-seeking jerk. He apparently stated before the election that his goal was to cost Bush the election and that's why they'd be advertising in crucial swing states, to try to siphon votes off.
He's obviously not doing this to try to "build" the party. The greens, by doing this, have that motive in mind, since they can drain off disgruntled dems if Kerry doesn't do what they want. But as for Badnarik, the only thing he'll end up doing is pi$$ing off libertarian-leaning republican types who'll never vote for him or his party again. All he has to do is look at Ralph Nader, who got the left-wing so mad in 2000 that his national vote went from 3% to less than 1/2% this year.
Thanks to him, I will never vote Libertarian at all.. I have thought about it..