That much is true

When Zyklon B poured into the gas chambers of the Nazi concentration camps, the murder victims suffered a series of muscular contractions that caused their bodies to jerk spasmodically prior to death.
The stormtroopers dubbed this jerking motion, "the Spandau Ballet".

Which is where the eponymous band got their name from.

I own several of their recordings. But I'm not third in line to the throne of Britain, so I can get away with it...

Bit o' general info on the semiotic appropriation of the symbol.

What a tosser....