Haven't tried this yet but the day is still young! I will update this post later once I get someone to fill it out for me. Good luck to the rest of you!
**Update!**
Just tried this on the train during my lunch break. I kid you not, this is what I got:
It reads: No, I will not give you any money. Go Away please! I swear this city still surprises me sometimes. Now if I only I had taken the time to ask them if it was a joke, a sincere reply or the instinctual response of a New Yorker who no longer listens when people ask for things on the subway...
We'll never know.