Did you check the logs Muffin ?
If someone start screaming "Heil einstein, all jews are a subrace, they're better dead" and continue a dozen times in 3min time, or other kind of stupid crap, will you "mute" him ? Seriously ?
Well, Red's offence was not racist, but it certainly was a "strong" one that needed more than a mute. A little 3h ban doesn't seem like an harsh decision. Just go to bed, and play again the day after, what's the big deal ?