Sorry guys, welcome to attending large events. Yes they should know better, but no they haven't always been taught better.
Danoth, my point is not that you wouldn't deserve to be annoyed. But there's a way to resolve it that doesn't involve a tantrum, or being pissed off or making a huff about it:
Step 1: Politely and calmly explain why the ruling/interpretation/explanation is wrong.
Step 2: Cite the specific rule and its wording, if available.
Step 3: Ask, "May we talk about this with the Senior Armor/Weapons Checker here?"
Step 4: Politely and civilly repeat Step 1, emphasizing that you appreciate their best efforts and you're only seeking to clarify this issue and help everyone get it right.
Step 5: Repeat Steps 3+4 asking for the Head Armor Checker, and if necessary the Head Weapons Checker.
I've run weapons check at Rag, and I've run my weapons through weapons check at Rag more than almost anyone. You've gotta have a zen attitude towards it and have backups and repair materials. It's just not worth ruining a day at an event like this over whether one weapon or piece of armor got judged incorrectly or unfairly. There will be another day, and another chance to rectify the situation.