You are right that hunger and thirst stops when being logged out, but weather does affect you, especially temperature does.
Not so long ago I had to kill an unconscious player that had logged out in the middle of my base building project(official pve server), I put the building on hold for a couple of days to give him a chance to move his body from my base, but when he didn’t, I fired up several furnaces around him and he died of heat within a minute 
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