My suggestion is a better structure so e.g after 'alone' on the first line you start a new line. Other than that, I liked the poem and the messaged it conveyed.

It is unbeknown how many have been hurt by stones thrown alone.
I know a kid nicknamed bones because he weighs less than 11 stones,
unarmed he has killed less than drones in war zones. I would inquire how many you admire have been killed by friendly fire?

thank you
I will edit when I figure out how

I like the internal rhymes in this poem and the message itself is very intriguing. Maybe you could use enjambment to fix the form? Other than that, I enjoyed reading this. It is well-thought out and the brevity works well.

A good message but it doesn't really feel like a poem the rhyme seems forced and the poem not well formed I'm not saying its a bad poem but it needs a little work.