What is the funniest alteration you’ve seen that someone has made to a sign?

Question by Dr House is in the house.: What is the funniest alteration you’ve seen that someone has made to a sign?
I’ll start.
The other day i was at a public urinal and there was a sign that said “Please flush after use”
Someone had changed it to “Please blush after self abuse”

Best answer:

Answer by matt kaye
Not really an alteration but freakin funny 😀

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