What the hell is wrong with some people?

So am in this KFC queue anticipating to get hold of a fillet burger meal. This two dudes come and stand beside me checking out the menu board, 3 guys were ahead of me so the menu was at a distance and it seemed they had to get closer to check it out. More guys turn up behind and this 2 dudes keep moving with me side to side as the guys ahead are getting served. Finally when they call out the next person(who should be me), they walk towards the counter as if i wasn't present. I stepped up told them to 'excuse me' and went to get my meal. But seriously, why would anyone do that? Some people need to be whooped honestly