Even if I planned to just stay? I won't be working, I won't even be in my apartment or the city I'd lived in for the year, I'd be staying with my friends, having a vacation. I wouldn't be violating the terms of the B1/B2 at all. The company sponsoring me to go actually suggest that if people on the program wish to stay for extra travel to apply for a B1/B2 at the interview, I already have one I don't understand how it's a problem.