Fair enough, when I let you go after a collision which damaged you and you ignored me when I wished you luck in getting back to land, I should, by your analagy have shot you down? 
I have to admit don't remember any such PM.
It's not that you
should have shot me down (it's not me to tell you what you should do or not), but you clearly
could have shot me down, and for sure I would not have been complaining about that. Any player with a red icon is a legit target, but it's each player's own choice to let some targets go.
And it's each players own responsibility to keep up his SA when sitting on the rearm pad
