Gratuitous Llama Courtesy Advice

Met the Butcher's Wife and the Llama-ettes at the Smithsonian for some lunch today. They came in on the Metro and the Missus asked me to pass along this plea:

Gentlemen - If you see a woman with three small children stuck standing up on the train and having a hard time keeping the littlest one from toppling over, would you please get off your duff and let them have your seat?

Thank you.

(I didn't think I'd need to say something like this, but evidently I do.)