Lets see you argue against federal government
yet you get benifits of it
now its easy to deduce the fact that thats illogical, you can criticize all you want, but it still makes you a hypocrite, as I said before I know REAL Libertarians who don't use city water, nor the police, and they bitch and moan about the roads, but that one is understandable. Its common sense, and you need to double check your definition of ad-hominem, it can't be ad-hominem if it is pointing out logic errors in an ideology
Any accusation of hypocrisy is ad hominem, CWAS. You are attacking the person, not the idealogy. Showing that followers of an ideology are hypocrites does not have any relavence to whether the ideology is logical or not. If all followers of that idealogy were hypocrites because it is not logically possible to follow it completely, then you might have a point. But that is obviously not the case here, since you pointed out "real" libertarians who follow your idea of what libertarianism should be completely.
Now whether we are hypocrites is still an important question, even if it is ad hominem. Most libertarians use government services, pay taxes, and protest against both. Where is the hypocrisy? Say a thief steals $500 from you and gives you a $100 bike in return. You believe theft is wrong. You could have risked your life by trying to kill the thief, who may have been armed, but you didn't. You could have refused the bike on principle, but you didn't. You figured that you might as well get what you "paid" for, even if the money was stolen from you and you could have gotten a lot better bike if you spent the $500 yourself. Where, in any of this, did you contradict your belief that theft is wrong by your actions? You never did. One can not resist a mugger for fear of his life and still believe stealing is wrong. One can accept a service from a thief which was paid for with his own money and still believe theft is wrong. Simply replace "thief" with "government," "bike" with "city water, roads, etc.," and "theft is wrong" with "taxes are theft, which is wrong." Libertarians are not hypocrites either.