Consistency accross the board with screeners is an ongoing problem.
I've been passing through the same northern port security checkpoint for 17 years. My current Nav Bag is 2 years old, and has the same ole, same ole in it for over a year.
Last trip, I was told the screener wanted the bag 50/50, so my bag was opened by a security employee, and half the contents removed onto a tray and the whole lot screened again.
When I objected and said I'd remove the contents, I was told I was not allowed to touch the bag.
I'm not sure how I managed not to blow a gasket!
But just wait for the next cyclone evacuation when one of them wants the jump seat!
As to Diddly Squat's question, I rocked up to work at an east coast port one day with an Allen Key in my pocket. I didn't realise this until I emptied my pockets. Next day at Perth I was denied access to the terminal with this tool is it was considered a security risk and not permitted.
I reckon at best you've got a 50/50 chance. Then you have to consider Murphy's Law.