As a fairly hardcore conservative libertarian, I can tell you that's untrue.
Except that it is true.
Here is the leftists agenda hidden behind the Libertarian Party curtain.
Libertarian Party Platform:
Throw open the borders completely; only a rare individual (terrorist, disease carrier etc.) can be kept from freedom of movement through “political boundaries”.
Homosexuals; total freedom in the military, gay marriage, adoption, child custody and everything else.
Abortion; zero restrictions or impediments.
Pornography; no restraint, no restrictions.
Drugs; Meth, Heroin, Crack, and anything new that science can come up with, zero restrictions.
Advertising those drugs, prostitution, and pornography; zero restrictions.
Military Strength; minimal capabilities.