Incidentally, how would his friend's CD key be revoked? It's not like the game knows who is using it.
Didn't DOMII check with a Shrapnel server over the Internet for "bad" keys?
The question then might be how is "bad" key determined.
Same key from different IPs? That might cause trouble for those with dynamic IPs, no?
__________________ In strait places gar keep all store,
And burn the plain land them before:
Then shall they pass away in haste,
When that they find nothing but waste...