to evade law enforcement or to promote disorder, from verbal assault to distracting law enforcers to building barricades. The more well-planned tactics occur, the more purposeful the disorder. For example, crowds may form human blockades to shut down roads, they may trespass on government property, they may try to force mass arrests, they may handcuff themselves to things or to each other, or they may lock arms, making it more difficult to separate them, or they might create confusion or diversions through the use of rock throwing, arson, or terrorist acts, giving leeway to law enforcers to be forceful or excessive while trying to remove them. Also, sometimes, terrorist elements. Most participants of civil disorder engage on foot. However, organized efforts, often implore the use vehicles and wireless communication. Participants have been known to use scanners to monitor police frequencies, or transmitters to sabotage law enforcement communications. If a crowd turns violent, effectively becoming a "mob," it may execute physical attacks on people and property, such as by throwing homemade weapons like molotov cocktails, firing small arms, and planting improvised explosive devices. If the violence is not pre-arranged, a crowd may resort to throwing rocks, bricks, bottles, etc. If violence is pre-arranged, the crowd can hide their weapons, or vandalism tools, well before the crowd formation, catching law enforcement by surprise. Crowds may arm themselves with: Gas masks Rocks Helmets Homemade shields Improvised picket signs Molotov cocktails Paint bombs Pipes Safety goggles Wire cutters A mob may erect barricades to impede, or prevent, the effectiveness of law enforcement. For example, they may use grappling hooks, chains, rope, or vehicles, to breach gates or fences. They may use sticks or poles to limit law enforcement's use of billy clubs and bayonets. They may overturn civilian vehicles to impede troops advancing to engage them, or vandalize law enforcement vehicles to try to spark over-reaction from law enforcement, or to incite further lawlessness from the mob. Mobs often implore the use of fire or hidden explosive devices e.g. strapped to animals, masked in cigarette lighters or toys, rigged to directed vehicles, etc. Not only can they be used to create confusion or diversion, but they can also be used destroy property, and mask looting of mob participants, or provide cover for mob participants firing weapons at law enforcement. If law enforcement engages with the mob, in returning fire, any innocent casualties resulting from