Comment by roryirvine

And yet the former led directly to Thomas à Becket's death and is the classic example of giving direction through indirection. It was much more consequential than an unknown stranger on the internet offering a bounty.

But, strictly speaking, neither of those are threats. In English law, they'd be more likely to be prosecuted as Soliciting to Murder or Conspiracy to Murder - I imagine there are similar offences in America.