for me... if you want to cut in the queue directly in front of me, ask first and give me a reason why... if i don't accept, you go to the back...

if they simply cut in, i'll tell them politely where the end of the queue is... if they ignore, i will shout loudly for everyone to hear... if still ignore, i'll push them hard, step on their shoes, trip them when the queue start moving, especially on public transport queue...