One of mine defaulted to root with no password set.

Username admin
Password password

As is tradition

No you have to edit the file for CD metadata and convert it to flac so you can pretend it was ripped from a CD, as is P2P file sharing tradition. Bonus pts if you put it through some filter to introduce a bunch of noise into the audio. Then ask in chat how you can convert a 128kbps mp3 to flac to increase the quality. Priceless.

It was pretty easy to find lists of half-life CD keys to play team fortress and counter strike for free.

Quake world & the quake fortress addon were fun and predates any CD key system so they could be easily found for free too.