If the body is diecast, snapping it off with pliers is much the simplest way to remove it. Remember to tighten
the shaft nut very tight if not using the anti-rotation tab and have a large knob on the shaft (typically you need
the anti-rotation tab for large knobs/chicken-head knobs as there is enough leverage to spin the pot and loosen
the nut with time.)
With small collet knobs its less of a problem.
Gorillas (metaphorical or real) will always spin pots of course, you have to use vandal-proof hardware for them!