Can you read me now?

For a while, there was an ad at the bus shelter where I transfer on my way to work each day that was about illiteracy. It was paid for by the City, and it had all kinds of information for illiterate people, and a number to call for help. Seriously.

It might as well have said "If you can't read this ad, please call the following number"

That's like speaking in sign language to a blind person. Or whispering to a deaf person. Or using words with more than two syllables to George Bush. It's a unique marketing strategy, to say the least.