It shouldn't be possible to be murdered at all. But phone calls can transmit arbitrary information to arbitrary parties. So it's going to pretty tough to limit any particular consequence of them.
Like what happened here: https://krebsonsecurity.com/2017/12/kansas-man-killed-in-swa...
What bothers me, and I imagine the original commentator, is that swatting works at all. It is deeply concerning that police in America are so reliably violent that they can be used as a fairly effective murder weapon.
Discussing the fact that communication mediums that allow arbitrary messages to be sent allows one to construct abstract scenarios in which such a transmission causes a chain of events that leads to someone's death feels like it misses that point.
Availability of military-style shoot-first-ask-later force to anyone is a problem, regardless of the communication mechanism used to request it.
That's my impression atleast, so I'd guess you agree.