Inho
"the raped (forced) The Merciful permits/forgives"
So by law you should not be published if you did not know (and you legally had the right to assume that it will not hurt him (maybe in this case we go by most people))
But the way Hashem made the world is, that your actions will be repaid (in a certain way, hopefully (for all Jews) just threw the frustration of taking a wrong coin out of your pocket)
Maybe by lowering your self and asking for forgiveness you are deciding that this should be your "punishment"
Some have a prayer in the shma on the bead to say
"Master of the universe i hereby forgive anyone who angered or antagonized me or sinned against me ... Whether he did so accidentally, willfully carelessly purposely through speech deed thought or notion ... May no one should be punished because of me"
hopefully it is reciprocal, from this prayer I see that someone can get punished from hurting someone even unintentionally (to me it seems out of Hashem's love of Joe, so if joe forgives you, their is no need to punish you)
"You were drowned because you drowned someone and The one that drowned you will be drowned"
PS
I have a question: if someone considers (decides) (even subconsciously) that somthing hurt him, is it considered legally that somebody hurt him
Edit
My above answer was about feeling but for physical damages you need to pay even if you did not want to make them