I recommend no parental control. Kids will always find a way...to do what they want to do. The more you try to stop them from doing something, the more they will want do it...because then it becomes the forbidden fruit... Just explain to them why they shouldn't do this or that while using the PC. And of course, always keep an eye on what they are doing just in case, they are about to do something really stupid.

Are you sure you really want to know what type of porn they'll be into? :D

No, but seriously. I see things like Wishbone does. Of course, I'm not a parent, so I don't want to say I know better, but I had "child protection" when I was younger myself and the first thing I did was to circumvent it (my parents aren't at all tech/internet savvy). And it seems I was smart enough to stay out of (too much :P) trouble.

I was thinking about this all day. And I think personal and family history and knowing your kids is also very important. For me, I have a lot of family members who have been to jail/prison for things that started on the Internet. I had a guild leader of my Guild Wars days that went to prison for a very long time for something he never told anyone about. One day he was there, the next he was gone and he only go the message out to one of us (we were a big guild). So I think there's genetic stuff and I think I'm a bit Internet-jaded from some of the things I've seen.

I am of the philosophy that technology should be used as a tool, not a way of life. And it inherently carries dangers. Pornography is the obvious one. It's a lot easier to get addicted to porn when you're 14 than 18. And it's very hard to get un-addicted when you're married. I've known of some couples who ended up divorced b/c of their addiction. And for some folks, it's not an issue. And for others it is. But I don't see how Internet porn is a necessity in my children's lives. They'll find it on their own. But I'd prefer it was very difficult to become addicted to it in my house. And if they can use the Internet as a tool instead of a fix, then I think they could do some amazing things with it in their adult life.

P.S. I'm not trying to preach to anyone. I'm just saying how I'm figuring it out for my family. I truly believe that every family should think about it and act on what they decide. But if they do decide to block or track, I strongly suggest OpenDNS. It's very hard to get around and it's very easy to implement and it's free and it has bonus features (like blocking known bad sites [viral and otherwise] and correcting misspellings in URLs).

A metal cage works.

We're basically on the same page. My point with the door locks is that we ask people to do things, but then we also protect ourselves from those who break rules.

I do think that good parenting includes putting up locks/tools to protect their kids. Not everyone can handle the same things, and some kids won't stop exploring until they get hurt. Very personal decisions, but the tools need to be there for when they really are needed. Involved parents are essential, but not always enough.

I tip my hat to you, sir.

Parental supervision and a strong windows password...perhaps locking it up when you're away from home.

Yeah, of course, own experiences and knowledge of your family is important and nothing anybody else can judge.
Whatever you're doing, I hope it turns out okay for the kids.