CS gas can be used to disperse rioters.
However, as the vapour drifts, it can affect non-rioters in the vicinity, who are either keeping their heads down, or just looking for a chance to get away.
The answer may be found in the BorgCo multimode smoke grenade.
Available in flail-release hand-thrown or 38mm/40mm format for ARWEN type dischargers, the grenade has a two-part construction. On initiation, a low-yield pyrotechnic charge disperses 50% of the payload over a 10 metre area. This portion consists of a mixture of capsaicin (causing irritation to mucous membranes), a stenching agent which closely resembles the smell of sewage and decaying meat (promoting vomiting), and SmartWater, indelibly marking anyone nearby for later identification.
A smoke generator portion also fires, releasing a dense cloud of a moderate tear-smoke compound mixed with THC as a mild incapacitant.
The quadruple-whammy of stinky sewage, hot pepper, tearsmoke and the slight intoxication produced by a small dose of THC should be enough to persuade those involved that being somewhere else is probably a good idea; prolonged exposure will of course render the target incapable of putting up any serious resistance.
The unpleasantness of the other ingredients ensures that the temptation to have a riot just to get a free high at the public expense is minimised.-- 8th of 7, Aug 11 2011 Coming to a dictatorship near you!-- RayfordSteele, Aug 11 2011 Send your payment to:
BorgCo c/o Nixon, Bormann, Moriarty and Capone, Attorneys-At-Law, Down Behind The Water Pipes, Third Stall Along, Gentlemen's Public Conveniences, Victoria Station, London SW1E 5JX
(Used bills, nothing bigger than a 20, in a plain brown envelope).-- 8th of 7, Aug 11 2011 Use putriscine (sp?) as your nauseant. Nothing works better.-- Alterother, Aug 11 2011 [21Q], the effects are much more localised. Smaller amounts of compounds in one location, rather than a large amount of a single compound. Proportionately faster dilution.-- 8th of 7, Aug 11 2011 Does it play music? At least a little clip? If it does I will remove my bone.-- bungston, Aug 11 2011 Apart from the natural puerile glee found in combining chemical-warfare agents ("dogs with bees shooting out of their mouths and lasers on their heads...") I really don't see any sort of workable idea here.
For starters where you want to place your smoke canisters has no relation to where you want a very localised flashbang effect. So "multimode" is pointless.
[marked-for-deletion] flavour.-- FlyingToaster, Aug 11 2011 I agree with FlyingToaster's characterization, but not with the marked-for-deletion tag. To me (but apparently not to others), this is just not a very interesting idea.-- jutta, Aug 26 2011 random, halfbakery