From: Taylorville, IL
Destination Set? I haven't heard that term in 10 years. ISA2004 and newer doesn't have Destiantion Sets,...only ISA200 did.
Anyway,...the best thing to do is forget the Destination Rule idea. I've tried those from that site before too,...but they are too manageable and unmaintainable.
Go to www.opendns.com and create an accout with them,... follow the instructions on their site about how to use them as a DNS Forwarder if you don't already know how. It is really simple, you just replace your existing Forwarder with them.
Then go into the account settings and specify what Categories of webs site you want to block. It is based on categories, not individual sites. However it does have a Blacklist and a Whitelist that you can add sites to yourself.
If you don't have a Static Public IP# they have a utility that you install on one of your machines (probably the ISA, but can be any machine that stays on all the time) that will keep them updated as to your current IP# so that your Restrictions you created will be properly applied.
It is a free service.
Since the Play Station most likely uses IP#s and not Domain Names when it communicates it will be immune to the restriction,...but even if it uses names it will probably be fine. If it does get blocked you can go tot he Reports page on OpenDNS and try to figure out what Domain Names the PS is using and getting blocked by,...then you just add the name to the WhiteList. The Reports are not live, it may take a day for the Report to start showing data.