lol, i remember my first 141 walk-up exploration...
i did the same thing..
i lurked behind other bros... peeped thru the open doors.. then moved away like a scared little boy.
but now... yes, like you, i sometimes get irritated by other guys who keep stalking me..
there's even one asshole who everytime after i pressed the doorbell, he would then stand in front of me, blocking my view. and he has this incredible BO...
when i told him to press his own doorbells, he gave me one kind of a fuck face and spit on the floor.