There are so many hundreds of them around that I decided to narrow it down to a category. Food was just too weird: complex and culturally-specific menus are impossible to translate. A lot of signs had inadvertent naughty words in them (and I restrained myself until that last one, which was just too good not to include). I found a few weird and even lovely signs about "keep off the grass", but there weren't quite enough of them, so I expanded the category to Parks and Recreation, outdoor activities that simply demand lots and lots of rules.
Thus we are told there is a "go aheand smorking" section, that we should "be careful drowning", that we should watch out for falling people, and always "care for life. Do not fun."
I will not tell you what you should do in that last one.