Furthermore, the corporation accused of double standards in enforcement when images of cross-border smugglers pushing overladen trollies appeared on social network sites on a regular basis, whilst local students carrying large musical instruments were reported to have been stopped and issued with written warnings. Leading musicians joined in the criticism of MTR's stance on large instruments; some citizens invited players of cellos and other large instruments to congregate on 3 October 2015 with their equipment at Tai Wai station, where the majority of these instances occurred.