It's sort of interesting(annoying might be a better word) debating with modern day Libertarians because I've felt myself forced to defend policies that I don't necessarily agree with entirely. The federal reserve, drones, NSA, foreign wars, bank bailouts, police brutality, and high taxes etcetc are all things the vast majority of people are dissatisfied with, so it's really easy to attack those subjects and get a lot of people behind what you're saying(See Ron Paul and others). The problem(As Rok nailed right on the head), is that Libertarians are either unwilling/unable to come up with resolutions or they offer ineffectual solutions that aren't rooted in reality.
