Real big brain glowie hours, I'm surprised no one's resulting to just filling a car with some kind of vicious, flammable liquid and detonating it in a crowd, or at an event, or just using flame-thrower tactics.
I think people have forgotten what a flamtherower is: like a 40 foot stream of literal death for anyone who gets more than clipped by it. Fire spreads, smoke spreads, the right bike locks on the right doors and people get trampled. Industrial fuck ups from the 19th century are still some of the highest body count disasters we've seen.
I'm sure someone will comment that the government doesn't wanna ban gasoline so of course we don't have these, but still. It's like the "mail bomber incompetency theory". Why do mail bombs never work? Because sane people don't build them and the insane don't take their time.