LBA - AMS recently, a lady went through security check with an open bag full of knitting & needles, and knitted merrily in her aisle seat all the way to the destination.
I fail to see the problem. Frankly you could juggle flick knives or swords in the cabin if you wish (away from others of course). What I don't want are people on board with high powered firearms, explosives, unpleasant chemicals or electrolytic solutions. But most of all, I don't want people who intend to do harm to others. Unfortunately they are not spotted by the "one size fits all" political theatre, delivered by the otherwise unemployable, that we all have to endure every working day.