Unfortunately as described in my earlier posts I don't think it's possible to do properly or FD would have already done it by now.
Frankly, this is highly doubtful. Code-wise it should just be a matter of implementing and checking a few flags on the target that's in the crosshair, if the engine doesn't allow that then it's deeply flawed.
So my guess is that either they're so late on everything (look at mining...) they just haven't bothered with it, or that they just don't care at all (because vision).