My soul hurts from having read that. There's effective advertising and then there's overkill. But it does drive a point home.
I appreciate the joke, but it looks like it's on a subway train or a bus. Young kids will be looking at it without anybody there to explain it for them, and they'll think this is good grammar. What a chilling thought!
I doubt kids young enough to think it's proper grammar would pay any attention to it, and older kids would either know it's wrong or already be in trouble. But it seems a pretty straightforward message to parents, IMO.
When I lived in Toronto in the 1980s, lots of young kids (preteens) rode the subway alone. They'd go to school, hockey practice, anything, on the subway. Nowadays I have a twelve-year-old nephew who lives in Toronto, and he's been riding the subway alone for years. It's no biggie.
They should at least add a * after they're with some small letters. Now it just seems like a mistake.
My eyes! They burn. "Teach your kids proper grammar, because remember, it's not just their future: it's all of ours." Oh, how I wish they had done that right; that might just haunt me forever
How about "There! Kidding rite"? It kind of makes sense: "Look over there! Someone is kidding a young person!" "Yes, it's an ancient rite of passage these people have. When children turn thirteen, they are kidded for a day and a half." "So after that, they're regarded as adults in this society?" "No, just confused."
This reminds me of a sentence I read the other day and it made me laugh. It was a caption for a picture: "Building sheds like a snake." It was funny because it can be read two completely different ways.
The humorist Dave Barry found an interesting one in a Pacific Northwest newspaper. The University of Washington sports teams are known as the Huskies, and the University of Oregon teams are known as the Ducks. A women's team from Washington defeated an Oregon team, and the headline was "Husky Women Subdue Ducks." I laughed at that one.
Clearly it was. The sad thing is how many people will read it and scratch their pointy little befuddled heads.