At least your chain saws, extension ladders, lawn mowers, nail guns, barbecue grills, pressure washers, welding machines, etc will come with a good 50 pages of warnings and instructions in 5 different languages. Ignore the paper or read it - your choice. But when was the last time (any time for that matter) you saw a mechanical come with any paper?
Y'know, that's a good idea, Rickajho! I've never seen a mech I bought (either online or in a B&M) come with any kind of directions/instructions. It was okay, I spent a ton of time YouTubing the heck out of mechs before I bought my first one, but a lot of people aren't gonna do that.
It wouldn't have to be War & Peace - just a little pamphlet with some information on the best batteries to use (IMR in my opinion) the potential hazards of building below .4 ohms, don't carry the mod in your pocket if you have change or keys in them, maybe throw some information about hybrid connections and extending pins too.
I agree, you're never gonna idiot-proof the world, but putting a little relevant information right in the hands of somebody who just purchased a mech would be a step in the right direction.