[Ricochet]

This is not the case with airsoft, and it is a law that is there to serve a purpose. There are plenty of interest groups in Canada that do tactical training, using military methods and gear, as well as live fire. Many police, military, and civilians belong to these groups, and conduct themselves within the law. Airsoft isn't even likely on their radar. Firstly, they would have to identify "you" or your "group" as some form of threat to the public, or threat to security. Likely this would mean you're already being monitored for some end game plan they assume you have based on Intel. They then put forth an order for you and/or your group to desist any further actions towards this end, or restrictions based on the quantifiable threat or concern. If you continue, you will be in breach and will likely be arrested, charged, and convicted.

A bunch of guys playing airsoft, which is a legally accepted and sanctioned game the same as paintball, is not the above. If they were using it as a training platform to pull off some kind of attack, well then there is a problem, but the airsoft guns themselves are the least of their concerns. If I were you, I'd be more interested in how local by-laws affect your ability to play. Things like discharging airguns, firearms, etc, within city limits. That sort of thing.

Doing sudo-combat simulation while trying to have fun would be severely overshadowed by martial arts training or sport shooting, etc, both of which and related are perfectly legal. Many laws like this, such a mischief or criminal negligence, have an open ended meaning, and are used as a tool in unprecedented situations, or situations that do not have a consistent theme.