Flysafair massive security breach!

Upon boarding a Safair flight my hand luggage was taken from me reason being the overhead stowage compartments were already full. This proved to be nonsense, the stowage where I was seated had more than enough room for several bags. When disembarking I collected my luggage at the same point it was taken from me. When renting my car I opened my bag only to discover that valuable items were ****** and it is a miracle my laptop was still there. My dismay and disgust at ******* merrily rummaging through my personal effects is obvious, however what concerns me more is the massive security breach in the overall system. Why bother with the security questionnaire and security scan when at the critical time of departure any random person can have full access to anyone's hand luggage and take or deposit whatever they want. What a ridiculous mockery of the whole entire security system!