It is also important to realise that in Scotland (with a different legal system to England) there is such an offence as "Breach of the Peace" and you can be arrested, charged, convicted and sent to prison for this crime. It is not a concept, but a crime at Common Law, and is committed when a person, anywhere, acts in a riotous or disorderly manner to the alarm or annoyance of the leiges( other people) The Police have the choice, depending on ones previous offending history, to either caution and charge and report the matter to the Procurator Fiscal, or issue a Fixed Penalty ticket. The Procurator Fiscal, having received a Police report, has various options and one of them is not to prosecute on this occasion but warn the offender that any further similar reports from the Police, would result in prosecution. In these cases, since no case has been called in the court there is no conviction of any kind, however, it will show on your criminal history