It is wrong, and the current situation, where any allegations causing stress and disruption to individuals, companies, crew and passengers can be made maliciously without any comeback has to be looked at. It has happenned already in the UK as discussed previously.
A situation where a disgruntled passenger, security staff or colleague etc can make patently false accusations is no different to hoax bomb threats IMHO. It is fantastic to hear this colleague has been found to have no case to answer due to his innocence, but that does not end the incident or the questions raised as a result. Where does it end? 'Drunk crew' is as sensationlist a headline as it is a false accusation and a sleight on our professional standing. People have and will make these claims based on no professional training and without coming into contact on occasions with crew. If only for 'educating' those who make false claims need to be dealt with.
Regards