I meant cheap as in price, not as it effectiveness. You will ALWAYS have hydrogen on hand to fuel a flame thrower, but there are stages of the game where bullets are at a premium or where you really need to make rockets instead.That might push it into a level of complexity that will just assure it doesn't get considered at all. And really, I'm pretty sure 99% of the blocks are made specifically to be flame retardant anyway. I don't accept the premise that a fire turret "trap" would be "cheap." In a similar configuration, the existing interior turret would be pretty much just as deadly, even potentially at longer range. I'm thinking the flamethrower would only be effective up to 3 or 4 large blocks' distance. Interior turrets are already fatal to players within 3 seconds at 800m if movement is restricted.