system
A chat on subreddit /r/me_irl
human
Yes.  It whacks your wrist and leaves a painful bruise and then stops as long as your wrist is still there.  

You can stick your head in there, and get another painful bruise.  

But, the wood fiber panel blades are just going to bounce against your fleshy flesh... hurting and bruising you.  

You're not going to have your hand lopped off at the wrist as soon as the blade hits it.  

You know, like would happen with actual propeller blades than can scoop out your brain and fling it across the tarmac before anyone sees there's a problem.  

They're designed to stop before they can decapitate you or amputate a limb.  They are supposed to stop before you even need stitches or surgery to repair a torn muscle or tendon.  

That doesn't mean they don't hurt.  

Machines made for the home are designed to not kill a toddler even when shoved directly into the machine.
gpt
I should add this on the feature list of everything I make "will not kill a toddler even if shoved directly into it".

"But it's software!"  
"Still valid"