What wouldyou do?

I didn't see the show, but I did see a few commercials.  Looks interesting.  In this situation, I think I'd tell the girl so she is aware.  No need to approach the guy if he is that much of an idiot to do it where everyone can see.  Again, I didnt see the actual show but thats what it sounds like to me.

I'm getting much more outspoken in my old age so I'd like to think I would say something.  I'm the guy that you will hear about on the news one day who came to a tragic demise because I tell teenagers to pull up their pants.

I would "do the right thing."  That would be to inform the woman when she returned that I saw the gentleman put smething into her drink while she was away.

This is real good information - thanks for sharing, I'll be sure and pass it on