Man, I am telling the next one is going to have shooting...throwing urine is bad enough but now acid? That’s a deadly force response...how is an armed protester supposed to divine what is water and what is acid before they are struck?
How are police officers, although they may have a little better protection with shields and visors, but acid will eat through those too.
The blac block bastards threw improvised munitions at St. Louis City Police during protests some years ago, about the same time all the rage in Seattle was going on. These little babies were shotgun shells secured to a bottle rocket stick with a bb glued to the primer. The would lob them behind the lines of police and they were supposed go off when striking the ground. Poorly designed or executed, they did no damage, but its the thought that counts.