soccer mom stickers

I was following a blue minivan the other day that had one of those vinyl stickers on the rear window that had the name of a local kids' soccer organization, a soccer ball, and the name "MADDIE #6" under it.

Basically, this parent was advertising that they have a school-aged daughter who plays on the soccer team and wears number 6, and gave out her name. This is the exact kind of information that parents tell their kids not to share with strangers on the internet, but here they are telling the whole local area.

This same organization posts its game information online. Anyone can find out where they play. Someone could approach little #6 and say, "Hi Maddie! Don't you remember me? I'm a friend of your mom's. I drive a blue minivan just like hers. She said you might want to meet my dog, she's in the car, come on."

If I had kids their names would never go on my car, nor would any other identifiers like sports teams or jersey numbers. Is this too much risk?