We definitely can forgive if someone asks but if they do not ask and continue to harm then here is what Jesus has to say regarding harming children...

Mat 18:6 KJV But whoso shall offend one of these little ones which believe in me, it were better for him that a millstone were hanged about his neck, and that he were drowned in the depth of the sea.

Shared using AndBible: Bible Study. (https://andbible.github.io)

As far as harming others by their carelessness they know what they are doing.