Thats a good point, Brian, and I hadn't thought of that. I was thinking about spring bears and a friend of mine accidentally called in a huge bear while cow calling elk. He didn't have a bear tag at the time and almost had to shoot it in self defense at 7 yards. So now, I guess, only P&Y boars show up in my bear calling day dreams.
So really, if I was doing the responsible thing and confirming the lack of cubs prior to calling, then I'm kind of back at square one. Spot and stalk with calling as a final measure to seal the deal.