No insult intended at all.
On our return flight a week ago, the only things we put in the overhead bin was a bag of legos from
legoland and my laptop. That was for 4 people. Someone who had two *large* carry-ons was actually laying his carry-on on top of my laptop!

I couldn't believe he was so thoughtless of my *stuff*. Luckily the flight attendant caught him before he did any damage.
3 of our 5 checked bags were checked by TSA. They had a small sticker on the sticker outside that says were the bag is going as well as a piece of paper inside saying that it was inspected. They also sell locks for your luggage that are TSA approved. I had that on 4 of my 5 pieces of checked baggage.
I honestly don't care what people due until it infringes on my *space* - such as putting their bag on top of my computer.

Or last year when the woman next to me put a bottle of water up above us. It leaked water all over the entire compartment and then started dripping down on our heads. Yeah - I was REALLY happy.