Starting with pulling on the door is already impolite imo. If there is no visual cue as to the occupancy of the room, then the first thing one should do is knock. If the light is off or the occupancy signal says it’s free, then sure, try the handle. Otherwise knock first, give the person who is shitting there a chance to reply with “occupied” or to knock back. But looking through gaps or trying if the door opens with the handle and then going “oops sorry”, please no.
Same goes up for offices, meeting spaces, bedrooms etc, when the door is closed and it could be occupied, always knock before attempting to enter. Less bad when someone does it, but still, one could just knock.
Starting with pulling on the door is already impolite imo. If there is no visual cue as to the occupancy of the room, then the first thing one should do is knock. If the light is off or the occupancy signal says it’s free, then sure, try the handle. Otherwise knock first, give the person who is shitting there a chance to reply with “occupied” or to knock back. But looking through gaps or trying if the door opens with the handle and then going “oops sorry”, please no.
Same goes up for offices, meeting spaces, bedrooms etc, when the door is closed and it could be occupied, always knock before attempting to enter. Less bad when someone does it, but still, one could just knock.