See, here's the part that everyone seems to have trouble understanding in these 'wars'.
First, I bring spare batteries. Mainly because I'm not an idiot, which I am forced to presume anyone who claims to be flat out of luck if they run out of batteries is.
I hate to point fingers or make outlandish claims, but here is a thought - if one knows one is going to be shooting a lot of photos and one fails to bring enough (batteries, film, recording media, etc) then, yes, one is a low-grade, blithering, idiot and pointing the finger of blame at the item one was too stupid to remember just makes one look even more pathetic.
Imagine if I claimed that cars were stupid because they run out of gasoline. The correct response to such a claim would be, "Fill the tank, zipperhead."
Second, spare AA batteries, which I try to make sure my cameras take, are available at far more drugstores than color print film these days. So again, not sure what kind of booger-eatin' morons cannot find AA batteries at a drugstore. "The camera dies and you can't get more batteries, so digital cameras are dumb," they cry. Apparently because they prefer wooden torches to flashlights - you just can't buy batteries, so flashlights are dumb too. I suppose they leave their cars abandoned by the side of the road when the lead-acid battery goes out after six or seven years, too.
Third, I also shoot film. Duh. Just because I pack a digital camera does not mean I don't have room for a film camera and a couple rolls of film. Imagine that, film boys. I can do both. I know it scares you, but try to calm down and imagine it.
So I guess I just don't have these awful problems that the film baboons seem to think anyone who shoots digital is doomed to.