Is KS ing a thing in high ranks? Not so much asking if people do ks as I'm asking whether it actually exists. Or is it not a big deal who gets the kill because your more team oriented and you are just happy someone got the kill?
It depends on the situation.
If you are a champion who doesn't scale extremely well with gold (i.e. Alistar, Leona, Braum, Shen, Maokai) and you can (without risk) give the kill to someone who scales extremely well with gold (i.e. Jax, Master Yi, the ADC, an assassin), it can be beneficial to do so.
If you already have a significant amount of kills (and gold), it can be better for your team if your allies get the kills. This means that your gold is more evenly spread and that multiple people on your team are strong rather than a single very strong champion.
In short, I wouldn't really say that KSing is really an issue at higher levels of play. Aside from the occasional toxic player, the most I have seen is players occasionally asking to spread the gold around so that it's not all funneled into a single champion.
its really not a big deal. Its not good if you do it, but its not really a thing. As long as you aren't getting the last hit just to get the last hit.
In higher elo people are better at getting gold from sources outside of kills, so the gold from kills isn't a huge deal.
