not sure if it was because i was 32 on my first thruhike & raised with some manners
but i never tried to be inconsiderate to others. stayed in a few shelters with my dog , usually we moved out to tent if we even heard others might be coming. i lent my tent out 3 times to hikers that didn't have tent or tarp, and they didn't want my dog to be woken up,or have to move. they didn't have a shelter but enjoyed the night in my tent, said it was a nice change for them.
if the ATC says its ok to stay in the shelter if you play by the rules, then its ok for me.