Massachusetts: Massive confiscation of private property

• In its infinite wisdom, the Commonwealth of Massachusetts has made the sale or possession of a bump fire stock or trigger crank a crime. They sent a letter to gun owners — of whom they have a list — giving owners of said devices 90 days to turn them into police. Without any financial compensation.
  ...................
  They have a list.

If they can confiscate an oddly shaped piece of plastic...what else can they confiscate?

Are you on a list? What might they want from you?

CryptoCurrency perhaps...or gold?