M.B.
I wouldn't worry about it. Seems to me like they are just playing. And this new "game" will probably get old pretty soon and it will be phased out!
Isn't it sad that we think like this? That is not an insult to you, I know you said you aren't bothered by it...just that you are concerned about them getting teased. It just stinks that as a society we would even think twice about something as innocent as this!