Can't fix stupid. Anyone with toddlers or even adults that mow while they are in the yard is the problem. Risk of injury from flying objects is real.
Legislate all the knee-jerk fixes they want, but can't fix stupid and those who do not have a clue what a lawn mower can do.
Not sure of your question, maybe just being funny.
From a previous message in another thread, you said:
So maybe you know what WFO stands for, rather than WOT (wide open throttle)?
If you get it off, don't tighten it down when putting it back.
All too many people think they have to crank on them as hard as they can. Good snug and let it go.. if by slim chance it drips some oil, then give it another 1/4 rev to snug it some more.
Don't whine.
To care for my decks (25 yrs now on oldest one), I only blow-dry with compressed air after every use. Mow 8 acres and have never had a rust problem. I very seldom put a hose to the decks, and keep them under roof.
Doing anything to the underside of a deck would be akin to doing...
Don't think the old gas in the mower nor the gas in the can had anything to do with the splash-back.
Whatever you did to cause it needs to be addressed.
More details would be needed to help you avoid the same happening again.
Avoid pouring so fast, or avoid having face in path of the splash...
This B&S 900 problem with backfiring and jerking starter rope out of hand.
With only limited "smarts" for this engine, thought timing off so looked at flywheel key and it was sheared in two. Checked valve clearance and appeared to be ok. New shear pin, reassembled but same problem.. hard to...