Ackermans Promoting bullying

I'm waiting in queue with my sons a there are two cashiers both seem to b struggling with a code or price so the line is not moving, I left my boys in the queue grab some socks at a watching diatance a see a guy walking past my kids nd cuts the line, I went back stood in tje queue and when they eventually call for next customer I decide to walk up to the cashier to pay, I tell the cashier my sons were in line before the guy so I am next, all the staff at the counter don't say anything to this guy even the staff member who was standing right next to me when we first got into the line. When I ask why they don't tell the guy he cut the line their reason is "By Ackermans rule we are not allowed to tell who came first and who came last" which I don't understand so they are saying if I come and heard straight to a cashier and the long line of people waiting their turn they won't say anything. Seems like their are promoting bullying my sons are small and they will not tell anyone who is bigger than them to go to the back of the line because they are scared. So now I am a bad perso. For standinf up for myself.