WAC 375.1.45. "Faux-Cred Card" Use Ordinance
I perused the newly-updated list and didn't find anything like this except for TBQ's Law, which only covers a specific circumstance. If this exists, I will proclaim myself a dork and fishbeat myself. So thus, I humbly present for your approval:

Wank Administrative Code (WAC) 375.1.45. "Faux-Cred Card" Use Ordinance.

Anyone disavowing their various prejudices by using the phrase "I'm not anti-_____, I have _____ friends!" or some variant thereof will summarily lose the argument and be subjected to a vicious fishbeating by members of the group in question. Double fishbeatings will be enforced if the "faux-cred card" is utilized more than once in one argument.

Examples:

Gay/Queer Cred Card: "I'm not homophobic, I have gay friends!"
Race Cred Card: "I'm not racist, I have black/Asian/etc. friends!"
Wank Cred Card: "I'm not wanky, I have wanka friends!"
Candy-Coating Cred Card: "I'm not anti-candy coating, I have friends who are M&Ms!" (Note: Anyone employing this particular "faux-cred card" instantly voids all ability to prevent said friends from being devoured by rabid chocoholics.)