Wikipedia defines common sense as “knowledge, judgement, and taste which is more or less universal and which is held more or less without reflection or argument”
Try to avoid using this topic to express niche or unpopular opinions (they’re a dime a dozen) but instead consider provable intuitive facts.
I guess that’s true, if you eat a whole bunch of snow at once you could get too cold - especially if you do it while not moving. If you have a fire, of course this is all a non-issue; just make sure not to light yourself, your surroundings or your container on fire, especially during sleep.
Hmm. Are there known cases of illness known from snow melt? It’s not guaranteed clean like domestic potable water, but I can’t imagine it carries too much by natural water standards, either.
There’s always a risk of bacteria. Maybe not super high a risk, but getting food poisoning while lost in the woods can really screw you over.