The Royal Caribbean cruise ship jumper

 https://www.dailymail.co.uk/travel/article-13301507/how-stay-safe-cruise-ship-overboard-tips-levion-parker.html

It might be a good idea to have constant security patrols on the decks.

https://nypost.com/2024/04/11/us-news/father-of-florida-cruise-passenger-levion-parker-who-jumped-off-royal-caribbean-ship-believes-hes-alive/

https://www.businessinsider.com/drunk-20-year-old-cruise-passenger-jumps-overboard-2024

https://www.thedailybeast.com/dad-takes-aim-at-cruise-staff-after-20-year-old-son-levion-parkers-fatal-jump

Jumping ship or trying to escape from a plane are always big concerns.

https://abcnews.go.com/Politics/after-man-opens-plane-door-mid-flight-flyers/story?id=99628573

https://people.com/man-tries-to-open-emergency-exit-door-passengers-restrain-him-duct-tape-8598310

https://www.usatoday.com/story/travel/airline-news/2024/02/21/american-airlines-passenger-tries-opening-plane-door/72681653007/

https://simpleflying.com/can-aircraft-doors-be-opened-in-flight/