The Perfect Weapon?

Israel has had a hard time breaking up protesting crows in a way which does not result in death and injury. But they may have found a solution which does not kill or injure anyone - a 'stink bomb' or, rather, a stink cannon. The Israelis have devised a concoction which apparently stinks to high heaven. You can't wash it off. People can smell you from a distance. It lasts at least three days. It can't be stored in police stations because it will eventually smell the place out. But it can be deployed via a water cannon and is non-toxic and contains no poison.