Apologies in advance, not read the rest of the thread, but I personally think that we're all too OTT about suncare now.
Obviously it's vital that we protect our children's skin, but equally by covering them up all the time, either with clothes or with sunblock, we are limiting their ability to absorb Vitamin D.
I read a very scary story a couple of months ago about the increased incidence of Rickets in this country because children are lathered in SPF50 repeatedly for every waking moment they're outside, and as a result they have soft and weak bones.
OP, I'm sort of with you and sort of not! I do agree that excess use of suncream isn't good for young kids (especially ones with eczema like my DS), but equally I disagree with holding them indoors or covering them up completely in hot weather.
There has to be a happy medium, surely? Mayeb staying out of the sun at the particularly hot times, but getting them outside at the other times, either with ONE dose of suncream (unless they're going in water, in which case reapply) or with light, effective (but not stifling) cover ups.