Originally Posted by Florian
You nailed it. Using a cliché that is almost universally understood to imply that the speaker is being less than candid, that he may in fact harbor racist feelings, defeats the purpose of communication.
Then how does one who is unjustly accused exculpate himself? Plead the 5th?
"You wouldn't be silent if you've got nothing to hide." Gestapo reasoning used by some people on this board. This is how witches get burned alive.
False accusations alone are enough to ruin people's reputations.