I am greatly confused on the hypocrite charge since that mostly is launched with left leaning ideological warriors, however, there is merit to what you are saying.
The problem seems to be that you are confusing 'libertarianism as praxeology' adherents versus 'libertarianism as ideology' adherents. Fair statement?
Perhaps Tom Fleming's eulogy for Rothbard would be interesting reading for you:
http://www.chroniclesmagazine.org/Chronicles/December2000/1200Fleming.htm"The problem seems to be that you are confusing 'libertarianism as praxeology' adherents versus 'libertarianism as ideology' adherents."
I'm not confusing them. I'm just pointing out that it is common for 'libertarianism as praxeology' adherents, as you call them, to hide behind ideological facades when it suits their agenda. I think this is dishonest.
In any case, I believe the Cato institute is doing something right when both sides of the neo-paleo argument like to bash them.