To be honest, a ban for this seems a tad over the top. Another warning/IC mute might've served the same purpose. Not in a bad way, but might I add, 24h bans are commonly used by staff against people they don't like/want to ban, because;
So people get the impression it's not worth appealing/submitting a complaint over, and they get snubbed by this same "It's not really worth it" attitude from others. I've seen players get away with exactly the same sort of behaviour without punishment. Is there a reason that this case gets punished, when others don't?