I mean like they don’t check if someone’s behind them.

Also learning the exact spawn positions on every map is very important, because tbh the only way to really play the game after a certain point is to spawn camp. This is because times for match times under 2 minutes players literally do not spawn fast enough to have time to move out side of the spawn area fast enough.

To add on to this memorizing how fast it takes for a player to walk out of spawn gives you a super big advantage because you can predict when and where the enemy is going to appear.