Not realizing that the room-temperature water is beginning to dangerously bubble around you is a common danger for many registered persons, as shown here.
Of course, international security, drug trafficking, the fight against terrorism, among other many areas of common interest that we both consider important -- and trafficking in persons, I should mention as well.
The reason for this stems back to the Public Order Act of 1986, which states that a riot is an activity during which 12 or more persons must be present together and use and threaten unlawful violence for a common purpose.