These are available as bumper stickers and t-shirts:

Here's my rhetorical question to you: why is this funny?

• The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!)
• There Ain't No Such Thing as Plain Text
• On the Goodness of Unicode
• Wikipedia article on Unicode

Here's hoping the next programmer who sees this is laughing, too-- and for the right reasons.