People who think weapon shot out of hand was/is annoying are doing it wrong. Think about it - you got shot. If the shot didn't hit your hand, then it would have hit somewhere else and you would be dead. But you got shot and survived. How is that more annoying than getting shot and dying? If you really want to die, you can type suicide in console.
It's more annoying, because the prick teammate who shot me made off with my gun instead of getting kicked for a TK (ahh, you see what i did there?)
So, basically, getting shot in the hand is always a better alternative to getting shot and dying.
For whom though? For you personally? Maybe, but for your team, which only has so many slots to fill, and one of them is currently running around beeing useless, because he has no weapon? Maybe not.. the team might be better of if you had died and come back with a gun, than having someone hide in a bush, unarmed and useless for half a round (which could happen, some people just don't want to die, and gladly would do such a thing).
As for griefers, that's not a good reason. Why not simply disable weapon shot out of hand from friendly fire?
It's a fix i guess, but it doesen't really fix the problem i mentioned above.. what good is an unarmed Rifleman to his team? How does such a mechanic aid the gameplay?
Most people only look at the cool factor of things like this from their own perspective, and yes, to you personally, it could lead to an intense and interesting moment in a round.
But look at the big picture, look at the whole team, where everyone should be having fun and working twords a common goal, and then the feature doesen't make a lot of sense.. beeing unarmed and useless is not helping your team, it's just tying up a precious slot for no good reason, so why, from a gameplay perspective, should the feature be there? Does it really accomplish something worthwhile? Or is it just a "lol kewl" thing, that can actually detract from the gameplay?
Cool little things are nice to have, but only if they can't detract from the aim of the game, which this one can.