How about tear-gas canisters that dispense calming essential oils? Aroma-therapy writ large.
We are on a similar plane of consciousness now. The aroma thing may do the trick.
America’s Police Will Fight the Next Riot With These Stink ....
Defense One
https://www.defenseone.com › technology › 2015/04
Apr 29, 2015 — It’s called Skunk, a type of “malodorant,” or in plainer language, a foul-smelling liquid. Technically nontoxic but incredibly disgusting, it ....