More people injured by lawnmowers. Power drills. Staple-guns.
Like, it's not even close.
Want to know how many thousands of people pull a TV off the wall onto their face every year?
Ban the toasters!
There is a difference: your lawnmower, power drill, staple gun, TV and toaster all feature built-in safety devices - most notably, when it has anything electrical in it, a fuse. These devices offer as much protection against user error and unavoidable parts failure as possible.
When people do hurt themselves with these things, that's usually because they act so foolishly that the device's build-in protections can't do anything about it. Either that or a particular fault inside the device occurs that was overlooked in the design's FMECA - in which case companies often get sued and lose for failing to ensure safety.
My beef with mech mod is, even if the user uses it carefully, intelligently and in good faith, if anything happens, there is no safety net. Using any device containing a battery capable of releasing a lot of power very quickly that doesn't even have a fuse is just plain retarded.
People who swear by mech mods, and their God-given freedom to buy and use anything they want without government intervention and yada-yada, would be the first to be shocked if electricians weren't regulated and required to wire houses with a circuit breaker, fuse box, properly separated phases and good grounding.
They take advantage of that awful nanny state whenever they buy a house - or a TV or a lawnmower - in full confidence that it'll be constructed properly and extremely unlikely to set fire to their homes in the middle of the night while they sleep. They bitch and moan when a company fails to live up to those safety expectations: just look at the stink when Samsung released their infamous self-combusting cellphone. Yet the same people throw a fit when someone wants to intervene to bring their dangerous type of personal vaporizer up to basic safety standards. That's just beyond me...
I'm all for minimal state intervention. But requiring a modicum of safety in a device in which none exists seems reasonable to me. Mandatory product safety standards are why houses don't go up in flame willy-nilly, and people rarely lose fingers and toes to lawnmowers anymore. We've all come to expect and enjoy safety in potentially dangerous electrical devices, and I fail to see why mech mods should be exempted.