According, it's the so-called 'Honorbuddy bot' that's been the focus of Blizzard's wrath, a program that automates the accumulation of PVP honor points. It's like these people don't understand the whole point of WoW - grind, grind, and grind some more.
But what constitutes cheating? WoW players have been using shortcut mods and UI addons since the game launched roughly three hundred and forty-eight years ago, so it's understandable that some might be confused about where the line is drawn.
World of Warcraft community manager Bashiok explained the distinction in a: "Botting is defined as automation of any action, not just character movement. If a program is pressing keys for you, you've violated the ToU."
So there you go. If you suspect anyone of flagrant cheating, you can either right-click and report in game, or email any relevant information to firstname.lastname@example.org. The company isn't messing around; according toof a player's conversation with a GM in-game, they've handed out over 100,000 six-month bans in a 24-hour period. Blimey.