The Southern Poverty Law Center’s has an Intelligence Report written by David Holthouse that gives a synopsis of the career Paul Cameron has made out of distorting facts and printing obviously bogus statistics about gays.
Cameron is the source of such lies as:
The average lifespan of the homosexual is 43 years
Homosexuals are 20 times a likely to molest as heterosexuals
Homosexual sex is more dangerous than smoking
Holthouse gives a brief description of Cameron’s methodology and demonstrates how clearly illogical his “findings” are along with a bit of his history and how his statistics have become standard fodder in the war on gay people and their freedom and equality.
If you are unfamiliar with Cameron, this gives a good starting point and I recommend reading the article.