It's great when people wait for others to group up before a pull but honestly nobody is entitled to the kill. It's not reserved for anyone's chopping board. If someone reaches the hunt before you and pulls it then I say fair game. If someone pulls it while you are there and waiting for others to group up, the same point applies. Is it considered bad manners? Depends on who you ask I suppose. Personally I believe this sense of entitlement needs to die and burn in a fire. People are willing to hop worlds to find hunts while others sit on their ass waiting for a shout in linkshell and then cry when they get beaten to the punchline.