Most of the negative I say regarding Libertarians is about the party, not small “l” libertarian philosophy. That’s why I often repeat the quote of William F Buckley (paraphrased)- there is very little libertarian about the Libertarian party. You may be shocked, I was a former LP member back in my college days and a couple of years ago had an article in Reason (I still eat that up like philosophical candy).
It is the LP and their ‘hippie’ tendencies (to quote Rand) that I have such a strong aversion to. They are to Conservativism and libertarian philosophy what Fred Phelps is to Christianity.
I was actually called a "criminal" for serving as an active duty Marine for six years.
Not exactly a page out of the "How to make friends and influence people" handbook.
Another thing was a sense of almost militant atheism. I'm one who doesn't care what you believe, just don't use it as a bat to beat others into submission. Saying people should have no faith in anything but their reason kinda leaves out all of those people who aren't very good at reasoning things through.
Rambling a bit here, sorry. Haven't had my coffee yet this morning. ;-)