The only requirement to be a member of the LP is to pledge not to advocate the initiation of force to change others. It's basically the same with the freedom movement as a whole.
Liberals and conservatives are both welcome. That's what confuses people. No, we aren't all potheads, we simply oppose the drug war.
Also, it is possible to be liberal or conservative and be an authoritarian in one's social or work life, and still be libertarian, politically. That is, one could voluntarily join an authoritarian church, be an authoritarian parent, send one's kids to military school or live in a commune that won't let you own anything, etc., and still want a libertarian government that will allow you to do so.
Freedom brings us together, haven't you heard?
What do you think? http://consequeries.com/