It just never ends. You really can't blame the people for these questions, it is the government's lack of education. If they spent only a fraction of what is spent on HIV/AIDS awareness then people would know how HCV is acquired.
Until then sit back and enjoy the show :)
As GSDgirl said negligibly possible with lots of "ifs" not the least of which did the other person have HCV.
IF they had a bleeding cut and drank out of the can and then YOU drank out of the can with a cut on your mouth You better get tested just to be sure.