People don't usually go an google for "staring with open eyes into the sun without protection". They come across such thing by chance, or synchronicity.
I think the moderators who make the decision may just work on some whimsical feeling. Let me give you an example:

A fairly popular website on Tai Chi taichi18.com offers, amongst free things, a program called "Solar Qigong". It seems to involve doing Qigong towards the rising/setting sun, but exactly how this is done I don't know. As this is a program for which IIRC $75 is charged, neither I, nor presumably the moderators will have sufficient evidence to make a decision whether this is falls under the dangerous practices labels or not.

While I understand the concerns about protecting children this is the parent's job, isn't it? If the moderators do this on a blanket ban basis then I find it rather condescending and an insult to one's intelligence.