I will recommend, then, that you spectate someone for more than a few seconds to determine if they're AFK for real or not. Not only are you likely to avoid situations like this in the future, but you're much less likely to lose a multiplier right away.
I can't believe you when you say you QML'd me before I started moving, because that isn't the way I saw it happen. If that was true I would've been far more likely to actually succeed at pressing M before I died, since I didn't die right away after I started moving. You may have started trying to press the buttons, but by the time you finished I was very much not standing still. I didn't get the message until I was beyond a few of the enemies I was dodging around.
I will shorten the ban by quite a bit, however, since the circumstances are so peculiar. Like I said before, watch for a post.