Geez you guys are touchy. Suggestions are suggestions, not criticisms, and everyone is entitled to make them. You don't have to accept them, but there's no need to get so defensive and hostile. Just try and explain why the suggestions aren't valid so others can better understand the reason behind things. Telling people to stop making suggestions is just narrow-minded.

Anyway, I think the suggestions are valid. If, for example, athletes and pregnant women can be given special dispensation to not fast then why can't people doing manual labour in 40-50degC temperatures?