id Software's Graeme Devine updated his .plan with word that scant hours after Return to Castle Wolfenstein has become available, so have leaked CD keys. Here's a post about this situation, and its consequences:

wolf/q3a cd-keys and so forth.

As we see cdkeys being distributed over the Internet those keys are being added to our ban list. It is very important to not share your own cdkey with anyone else.

If you've been playing for a while, get disconnected from your modem, and want to rejoin, you can rejoin the exact server you were on only. Because your IP address has changed, you'll need to wait for the key lease to timeout before you can join another server. The timeout period is 5 minutes.

Wolf uses the same cdkey generation technology as Q3A. THERE HAS NOT BEEN ONE SINGLE HACK on this system. Many so-called cdkey generators are in fact virus attacks that steal your own good cdkey, or worse, corrupt your files.