I'm a shadow, because people are afraid of me, but most ignore me

I am a shadow honestly.
No one in reality cares
I threaten people all the time, I've actually shoved a boy against a locker for being an a hole to me.
But in the end no one cares, who would I mean be honest with me, what would you do if I just gave up? Absolutely nothing...
Sorry just personally shit...
Where my pocket knife when I want it.