Scary stuff. I know of a guy on a R1 whose throttle go stuck on the track. He jumped off and the bike killed a corner worker. Throttle not snapping back is very dangerous.
Whoa. Yes, it is very dangerous! But the action of that rider is borderline criminal IMO. If the throttle sticks and you feel out of control with it, then you use your right thumb to hit the red kill switch to the "up" position, puol the clutch lever in, and safely coast to a safe and complete stop - and while in control of the bike. I find it almost impossible to think of any scenario where deliberately getting off the bike is a better option. The only one I can think of is if you're headed for the edge of a cliff.
But to your first point, I agree that this is a serious concern and it should be addressed right quick and not ridden until it's been corrected. Don't fuck around with this like you state!!!
Been chasing this issue sort of on my Gen 2 too.
Haven't did any real diagnosis cause it is really intermittent. It is a bit unsettling though not knowing if it's gonna stick or not, mine stuck at 5K and up for maybe the first two rides after the rebuild.
I've been on a few rides since then and it hasn't done it, from the looks my cables are routed correctly, I may throw new cables in when I get the money.
If you fix yours or find the culprit be sure to let us know!
Don't "look" at it, check them. I've seen it more that one time where the push-pull cables come off the throttle tube cam where they connect and get pinched between the tube and the inner housing inside. You can't see that externally and can cause it to bind up and overcome the return spring. This requires you to roll the throttle off manually to overcome it over-wise the throttle will stay open when it shouldn't.
I'm glad it's not a reoccurring issue with yours, but you should be diligent in checking everything out and keep a good head about you and what to do should it happen again.