Six Genealogy Myths to Avoid, Family Tree Magazine: http://www.familytreemagazine.com/article/Six-Genealogy-Myths-to-Avoid 

How to Identify & Avoid Genealogy Scams, Kimberly Powell, About.com: http://genealogy.about.com/od/basics/tp/scams.htm

Myths, Hoaxes & Scams, Cyndi’s List: http://www.cyndislist.com/myths

Cyndi’s List of Genealogy Sites on the Internet

Snopes.com, “the definitive Internet reference source for urban legends, folklore, myths, rumors, and misinformation”, Barbara and David P. Mikkelson: http://www.snopes.com Especially good for checking e-mail spoofs, like the one saying a prominent politician was the relative of a horse thief and/or train robber.