Wait, from what i gathered. your mother has the password to k9. so simply approach her and say that you found a foolproof update to k9, and get it from this site: I'm assuming that we have such a list, to make it foolproof.   Also why not quote R Veiner and install "monitoring software".    

However truthfully, an addict wil always find a way around the system-eg a new computer. So you realy need  to get him a handbook. mybe print flyers and leave them in your shul? or somewhwere that he will find them?