Basically, I want networked games to run poorly on a network, but I want everything else to run smoothly.

I would also appreciate advice on blocking games in general.

As far as I can tell, there's a few ways to completely prevent an internet game from running:

• Blocking entirely via DNS configuration (e.g. hosts file), or router DNS configuration
• Blocking entirely via a separate DNS server
• Blocking the application, by uninstalling or some kind of access control
• Blocking the application by automatically killing the process every once in a while
• Blocking the application by corrupting files periodically

However, I would like a more subtle way to block a program. Something that either:

• Increases latency (would this be doable through some kind of QoS like what DD-WRT offers?)
• Increases latency by using a special routing configuration for specific target IPs
• Throttle other systems resources, such as memory, IO, or CPU
• Screw around with keyboard configurations when a game is launched

I would like this to work on MacOSX and Windows, but Linux would be great too.

FYI I don't have a kid, but I was brainstorming with some friends and parents.