I face dilemma on this one. Some people say that confrontation affirms that what the abuser did hurt you, and gives him the satisfaction of knowing this.

However, if he doesn't stop, I do think you need to put an end to it by letting him know that you will not tolerate his behavior.

This is so true. If an abuser replies, it's to justify his behavior, or to make you feel guilty for "accusing" him, or to hoover you back in by insincere apologies.

I would not want a reply from a manipulative person since there always seems to be an agenda or ulterior motives behind what s/he says.