Your nose run like a fire hose continuously at work or uncontrollable flagellation. The flagellation smells like a dead carcass rotting in 100 degree heat. You have to choose one and tell why. Good luck.
Kensington do make a lock for LCD's that don't have a lock slot, sadly this just wraps around the lower part of the stand which for 50 quid is a bit much. Most cycle shops sell a very similar thing for under a tenner and do a very similar job. without drilling holes it is going to be difficult to get anything to secure to the screen on a permanent basis, short of fitting something inside the screen air vents it will be hard to get a secure locking method. Of course dismantling the outer casing to insert a locking mechanism (assuming you find something that works) will invalidate any warranty and may actually cause a shock or fire hazard.
I wear everything I can, CE marked armoured trousers and jacket, decent boots and gloves, most important an ACU gold stickered helmet (Schuberth, bloody good). So far I haven't gone to a hard back protector or full 'exoskeleton' although I can see the advantages, what I do wear worked very well in a 80mph slide and tumble, had I hit an obstacle nothing would have helped at that kind of speed, which explains the gravel traps and run-offs on tracks!