Your tank reminded me of what I came up with after 9/11. Put them in one of those big storage containers overhanging the roof of a suitably tall building. Fill it half full with some straw soaked in pig lard. Light the back end on fire and give them the same choice that the folks in the Twin Towers (RIP) had.
“Your tank reminded me of what I came up with after 9/11.”
I came up with a cage under a toilet at WTC, with spicy pork rinds in a vending machine for $100 a bag, the fund to be used to benefit the families of the victims.