Quite right! I remember on a domestic to NCL in December I was carrying a bag full of assembled Boeing models. I waited until everybody had boarded and then asked the Crew if I could use the wardrobe.

Put my bag gently on top and a few minutes later a chap came along, opened the wardrobe door and started swinging his bag to throw it in!

Fortunately I was right at the front so was able to say "whoah whoah ... terribly sorry" etc... and take my bag out before he threw his in. I then put mine back in gently and all was well with the models on arrival in NCL.