"To Me, if your sub/slave, loves you, she/he will crave your attention, and if they are an internet junkie, then withdrawing your time, and deniing them their online time is VERY effective. Hard on you as the Dom too, hence the reason many dont employ this technique."

I generally agree with a lot of what you say in your posts, but I can't agreee with this at all. If someone resorts to "you screwed up, so I'm not even going to talk to you", I'd probably consider walking, on the spot.