You may be thinking of when Blizzard used this argument for going after Bot creators in World of Warcraft: https://arstechnica.com/gaming/2008/05/blizzard-atte

You may be thinking of when Blizzard used this argument for going after Bot creators in World of Warcraft: https://arstechnica.com/gaming/2008/05/blizzard-attempt-to-kill-wow-bot-bad-news-for-copyright-law/ https://arstechnica.com/gaming/2008/05/blizzard-attempt-to-k...