[Tref]

"If it's free, it's for me"

I would have accepted the drink and if there had been a sales pitch I would have listened quietly for a few seconds and said, No, but thanks for Venti Soy No Foam Latte!

Its true you have to be very careful these days. It seems everything comes with a string attached, even free string. But that doesn't mean you have to put your head in the sand either. Next time, just engage the person in a conversation, find out what its all about. Maybe you'll come away with a good story.