On the issue of safety in conventions, why do convention organisers not uphold the law? Surely policing should be done by the police. Assault, harassment, verbal abuse and so on are offences either against the person or against public order in most Common Law countries (and in most Civil Law jurisdictions as well). So why are men who commit these offences not handed over to the police for prosecution as they would be if they were thieves or pickpockets or vandals? At the very least, hotel security should be called in. You would only need the occasional prosecution to have a permanent deterrent effect.