Are they really the coward here? You're the one who embarked on this entire crusade and are online bickering all to hide from the truth that if you had acted differently, your child would've never been seeking out a site like the one in question to begin with. As a parent that's the part that would disturb me, that it had ever reached that point under my own roof.
You out of anyone are in no position to be calling anyone a coward right now.
Hopefully that really is CB's last post, this whole thing is equal parts sad, embarrassing, and ridiculous.