Not hard at all. But since the copy of the reported message is sent along the report, it would be no brainer for the moderator to see it was unjustified when a person disputes it. That would mean a period when person can't use public chat channels to one person, and possibly lengthy ban for everyone who reported them since all of this leaves tracks, tracks that can't be falsified like screenshots or copy paste can. Also the amount needed for the autoban should be considerable, at least 50, maybe even in the hundreds range. Would someone to risk getting a whole linkshell banned just for kicks?