>a bot isn't necessarily bad.
I beg to differ. In MMOs bots encourage farming and can severely damage the game economy and balance.

>IMNSHO, there's no such thing as 'cheating' in a computer game.
Once again taking my experience from MMOs, bots are almost always in violation of the EULA as a form of cheating. Violating the EULA is an illegal act as well.

>It only really hurts yourself.
Perhaps if you're the only one playing the game and the results have zero effect on others. That's as silly as it is rare though; bots are generally used to improve one's standing in multiplayer games.