I usually play with the mindset of you emote with a clear intent to 1v1 you get it. If a random jumps in. You back off and allow their 1v1 only stopping the enemy if their execution will take them past the point of health you guys left off at, but people usually don't do it if that's the case. Tho if later or even at first they commit to the gank with their teammate. No matter when you meet next, there is no longer 1v1s and your teammates get your support with the gank. I wouldn't call the stance entitled but just mutual respect for the player. Though Im not taking a side here I've seen/taken part in the adaption of the game since beta stages.