The stuffed carryon problem has got out of hand
People stuff their carryons because they cannot get insurance replacement
They cannot get insurance replacement because the loss ratio is sky-high
The loss ratio is sky high because the industry has given "security" and baggage handlers a license to steal. Not to speak of all the pickpockets who congregate around the X-ray devices where they can get at the valuables most easily.
Fix the above, and I'll be glad to get aboard a plane in a paper kimono, with just an ipad and my passport and credit cards. The camera set, computer etc can go in the hold. Most pro photographers I know transport at least $100K of equipment. With a 1% loss rate, that means you would "lose" it once every year if you take two flights a week.
Rather than threaten the paying customers, why not threaten the staff whose outrageous behavior is causing the runaway handbag issue - or would you pilots accept finding that half the instruments have been stolen out of your cockpit, and the fuel indicators have been messed with so your tanks are half empty?