ahhh, the blurry lines of illegally downloading software. Some would say you pay for the key to unlock the software and not the actual files themselves and they would be correct. However, obtaining these files from a file sharing website is still illegal so who knows. I don't think anyone would frown on it purely because you legally obtained the key.
I don't know.
Quote: "I guess it wouldn't be an issue if TGC used BitTorrent to get out backups of CD's and etc, similar in the way Blizzard uses BitTorrent in the form of the Blizzard Downloader for patches and games. But since they don't, it isn't legit."
Torrents aren't illegal, It's what you're downloading that is. You can get distros of linux and various other programs through torrents that are perfectly legal, there is even an indie film out there that highlights the pros of illegal torrent sharing, which funnily enough, is legal because the creators have allowed it's spread through torrent sharing websites. There are also plenty of sites out there now which only supply legal torrents.
Also, I lost my copy of DBPro years ago so I just download the free version now, your CD key will still work with it.