http://query.nytimes.com/gst/fullpage.html?res=9901E0D7153AF...
"But later in life, Mr. Salinger proved far less adroit in dealing with the new medium of the Internet, publicizing what turned out to be a bogus document that Trans World Airlines Flight 800 had been shot down off Long Island in 1996 by a Navy missile gone awry. The episode badly damaged his credibility and bewildered some of his oldest friends."
edit: But I think OP is also concerned about the liability created for ones giving the advice, not just welfare of the ones receiving it. A guideline would help keep these advice givers out of trouble
Since I didn't give any legal advice[1], but you constantly insisted I did, what you're really lobbying for is the power to shut people up who talk about laws.
[1] Other than "get a lawyer". The topic of the post was how doing research might get lawyers interested because he'd been turned down so far.