<< Would you guys use such a thing? >>
Oh HELL yeah! I've been wasting over 4 hours here today lurking here at AT and other sites. I can't concentrate for some reason today. I love it when our internet connection goes down because I can actually get some work done.
You need to make it so that you can't disable it unless you restart your machine. And you need the ability to accept a list of websites to block but you can't rely on the user to enter them in. You'll need to recompile the code each time for us and send us the exe. It'll need to be uninstallable, un-end-taskable, and unconfigurable by the user. Unless that is, we contact you via email and explain that we NEED to get to AT for some reason or another. Then you can judge whether or not we should go to AT and if so, give us a one time use, random generated key to use that will enable the admin features so you can uninstall it or end-task it.
As you can see, I have thought long and hard on this problem. I've always had a hard time concentrating, if only you could make this for television...