We always admonish airsoft players who are using public transport when travelling to and from an airsoft game that it's best to wear civilian clothing rather than already wearing your BDUs. Other passengers and security personnel might feel uneasy with a sight of someone wearing a soldier's getup and with a gun bag. One would inconvenience himself, the security people, and travelling public when confronted in a public place with full combat gear and a replica firearm in the bag.

In a chat board in Taiwan, someone posted photos about an airsofter in UCP clothing, helmet, gloves, and gun bag accosted by Police guarding the Taipei Metro/MRT. We don't know if he was arrested or later on sent on his way after learning that he was carring an airsoft gun.

Thanks to Arnold for this link.