I totally disagree with your suggestion because it is really dumb in all fairness. Players that have a ping of 200 and over are alredy medium/hard targets to kill especially if they got low FPS on top of that high ping. This can be abused so much that it can't even be imagined.
Krystianoo said it well, maybe, just maybe, if players would stop doing the stuff that makes their ping go higher than usual and gain advantage that way, we'll do it. We all know that won't happen so...