First off I want to thank FGD for the awesome Tropic Thunder reference that won the interwebs today! Second I would like to discuss the OP. I have a better solution than nerfing the scouts. I say run a list that can beat it. Now this is not a "git gud" post but really get over wanting to nerf everything that is winning at the moment. I kinda get the Phantom nerf, kinda, but since then it seems to me the cry to nerf something that is winning has gotten out of hand.
There is a triple YV-666 build that beats the breaks off of the triple scout build. I say it go down and the guy who was running the triple scouts is a better than good player he is very good. Swarms can kill the scout build and there are other builds as well that can take it down. You want to discuss making the build harder by nerfing it instead of discussing ways to beat it. Maybe it is just my upbringing but I just don't believe in pulling something down to your level to succeed. I think these build are a good motivation to rise to the challenge and come up with something that can win against it.
In summation nerfing in general is bad and being creative and using you amble critical thinking skills to over come this build is good.