In light of certain events going on which will remain completely unnamed, I have decided to clarify on something exceedingly common that often has a few... miscommunications.
A popular strategy among villains is, when you're in a tight spot, to grab someone important (or not) and stick a sword to their throat. Often, this works well. But often, stuff goes wrong. Most commonly this takes the form of the victims - not the ones with the swords to their throats, but instead the people usually with their swords out, completely armored, and an intent to kill the villain - rushing forward, or doing some action to counter this move. If the villain is good, he slits the person's throat.
And then... an ooc argument saying they can't do that. Well, they really can.
Basically, a sharp object is at the person's neck. No, not an inch or so away - digging into the flesh. Most likely drawing a thin line of blood. I want you all to reach up to your neck right now. Feel that? Pretty darn soft, right? Imagine an incredibly sharp diamond/gold sword to that. You have quite a bit of valuable stuff in there. The merest move could kill them.
Now, have you ever seen a hostage situation on the news? A situation where a crazy gunman has a gun to someone's head. Finger on the trigger. There will be a line of cops around them, helicopters buzzing overhead, SWAT teams ready to move in. But they will not rush forward. Or try to do anything to stop this person - or at least anything overt in any way shape or form. Why? Because, hey, it might work. Who knows? They could have a sniper fire a bullet into their head. Everyone would be happy! Crisis averted! But on the other hand, it could just as well result in the man pulling the trigger. The civilian would die. And they will never take such a risk. If you do, in almost all cases, you are acting on the knowledge that this person will merely lose their minas and items, then return to spawn and all will be well. In a way, it's metagaming.
The criminal will be on high alert. Their focus is almost completely on the knife to the neck, and their automatic response to any sort of stimulation will be to move. It only takes milliseconds, at this stage, to cut through their throat. A loud sound, a movement, or the slightest touch will send them into almost a fatal flinch. This is the same case with, say, an arrow to the head. Even if they couldn't hear the passage of air from the arrow in time, the impact will cause their body to spasm automatically. All of this means that their quick hand will move to slice that throat in almost every case. Again, the victim dies.
Anyways, not only is the villain completely justified in killing this person almost immediately, these situations should be avoided almost always unless in the specific situation suits it, such as if the provoker was 1. Exceedingly stupid 2. Didn't care much about the victim, anyway. So all you rushing in, expecting to cover the distance, even if it is only a few feet, before I kill the small, pretty elven girl I have a sword to, can kindly go **** yourself rethink your actions.