desk003: I think the part about jerking off is a bit inappropriate, but I understand your anger and agree with the rest.
John: You should take your time to think why you're spying on your children. Let's first make this clear. Even if your country's laws allow you to do this (in some countries this would be illegal), it's unethical and unsocial.
Is it because you want to protect them? That would be understandable, but if you overprotect them, the chance is high that they will do something exactly _because_ you forbade it. Either because of defiance against you (that's a part of growing up) or because you created a "forbidden fruit".
Is it because you don't trust them? Then ask youself why you don't trust your own children. How can they grow up in a family where they aren't trusted?
Talk to your children. Tell them want they are allowed to do at the computer and what not. Tell then why in a way they'll understand (and I mean _words_ and _explanations_ not something else). You can install software to prevent them to install dialers or open webpages with violent or explicit sexual content. But tell your children before! A Keyloggers is a programs you shouldn't install under any circumstances.
As desk003 said: stop spying on your children! Do you want your wife to spy on you?
Regards,
Denis
P.S. Sorry for my poor English for such an important issue.