When you really need something done, the simplest method is almost always the best.
But don't tell that to Hollywood bad guys, who can't seem to kill a single victim without planning out a complex, Rube Goldberg-style sequence that's almost sure to end in failure.
So, we get criminal masterminds using methods like...
6Stuntman Mike's Stunt Car in Death Proof
Stuntman Mike, from Quentin Tarantino and Robert Rodriguez's ambitious bomb Grindhouse, seduces beautiful women who have nothing better to do but hang out in hole-in-the-wall bars in Middle of Nowhere, Texas.
Then he kills them, either by giving them a ride in the front seat of his stunt car (the driver seat is "death proof" but the rest of the car isn't) and crashing it, or just running them off the road.
Every plan results in his own car getting bashed to pieces. That means every time he scores a kill, he has to come back and rebuild the engine, put in a new suspension, get new brakes, shocks, axles, rebuild the transmission and who knows what else. All of this is after he's released from the hospital, of course.
But that doesn't touch on the most obvious problem: his insurance premiums. We don't even think Geico is going to be all that understanding after about the 12th woman turns up dead in one of his "accidents." Prepare for some skeptical looks from the claims guy, Mike.
A Better Way:
He convinces the drunken hotties to give him a lap dance to some R&B tunes, and then shoots them in the face.