What does this sentence mean?

This "Watch out for Bears" is to remind people of the bears in Hokkaido, Japan, and play a warning role. Sticking it on the car is nothing more than telling others that the owner is better, be careful and stay away from the car. But now there are too many posts, so there is nothing new.

The original intention of "paying attention to bears" is this: there are two iconic animals in Hokkaido: one is an owl and the other is a bear. You can always see these two kinds in shops of tourist attractions and resorts everywhere. In the past, there may have been enough bears in Hokkaido, so people will post warning signs of "beware of bears" in places where bears often haunt. Now, this warning slogan has also become a trademark with black characters on a yellow background. It has become a feature of Hokkaido and appears on many commodities such as T-shirts and wine glasses.

"Tear off the' bear infestation notice' you posted!" Every time I see this slogan posted on my friend's car, this is a must! Unless you understand what it means and are willing to post it. Sorry, unless you are Japanese, or you love Hokkaido and Japanese culture very much, I despise you from the heart!

I really don't understand why you posted unique warning signs in Hokkaido, Japan, in Shanghai, Beijing, Guangzhou, Jinan, and even Tibet and Xinjiang. I don't think the Japanese will post "The Great Wall will never fall down" on their cars.