People can publish instructions for manufacturing illegal drugs on the Internet with impunity because First Amendment rights protect free speech, and the Internet provides "invisibility," law officials said Monday.

So-called "Nazi" methamphetamine labs are sprouting up in greater numbers across Texas. Some of those labs may be using recipes for the drug posted on the Internet, said one U.S. Drug Enforcement Administration agent. But it is not a crime to publish those recipes online.

Lonny Watson, resident agent-in-charge of the DEA's Lubbock office, said methamphetamine labs are being seized in ever-greater numbers, but the Internet is more of a factor than a cause.

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