How bad is it to make toddlers cry for the sake of art (photography, movies, etc.)

The real guilty party here is whoever gave the girl on this page a haircut.

Anyway, I think I’d feel worse for the kids if the series of pictures showed them eating french fries from McDonalds.

Yes - my son is now four, which means he was, in fact, a toddler.

It’s not mean or cruel to make the child go to daycare to stop eating dogfood, even if those actions make him cry.

It is mean and cruel to elicit the tears for no good reason. Both daycare attendance and non-consumption of dogfood qualify as good reasons.

I find it unlikely to disabuse you of that notion at this point.