Libertarians are NOT against all regulations.

This started as a Libertarian government, limited to sensible regulation.

The just function of the US government is to observe and protect individual rights in all areas of law, and to respect the limitations of the Constitution and those implied by the enumeration of individual rights, when reviewing and creating legislation created and put forth through constitutionally prescribed means.

Libertarians are for LIMITED GOVERNMENT.
The Government was designed as a CONSTITUTIONALLY LIMITED, democratic representative republic.

Its no coincidence.

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"If in the opinion of the people the distribution or modification of the constitutional powers be in any particular wrong, let it be corrected by an amendment in the way which the Constitution designates, but let there be no change by usurpation; for though this in one instance may be the instrument of good, it is the customary weapon by which free governments are destroyed." George Washington, Farewell Address, September 17, 1796.