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Can you figure out the hidden meaning of this Vienna sign?

Can you figure out the hidden meaning of this Vienna sign?

During a recent visit to Vienna Austria, they were selling this sign.

At first, I didn't get it. Then, after thinking for a bit, it came to me.

Do you understand this sign and what it means?

What do you think about it?

Updates
13 h
Most people got this. Many people confuse Australia, which has kangaroos, and Austria, which does not. Complicating matters is the three-letter-abbreviation for each: AUS=Australia, AUT=Austria.

So, some creative people in Austria have created the "No-kangaroos" sign, which you can find in stores all over Austria, in various shapes and sizes, including on T-shirts and sweatshirts.
Can you figure out the hidden meaning of this Vienna sign?
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