I recently made a smurf to test my theory on promo games and it seems to be 100% correct.
I made a smurf because I hat a really bad promo set on my main and I thought "man it always seems to happen in the promos." Of course it is probably just that you remember them the most because of how important they are, but I wanted to give it a go and see. I had some interesting placement games which allowed me to test better as I was dropped in S4. I quickly netted myself a 65% win rate and climbed relatively easily. That is, until I hit my promos. Every set of promos I have had on this account have been the worst gaming experiences I have ever had. I am talking: being called the N word for not ganking being told in vivid detail how to have sex with my mother for not ganking being told to kill myself having my top laner die and my mid says okay if ur trolling i will too (0/29 combined score with 36 total deaths on our team) "no I am jungle" "I am trolling bc I lost my last game" - bans my hover having my adc follow me through my jungle and take cs bc "tempo is shit rune idiot" All of this without me using the chat function once. I am sad to say that I am finding a pattern among these promo games, and it is not a good pattern. The things being said and done are directly laid out as "permanently bannable behavior" and I doubt they just decided to take it up right then and there. Also a nice thing I have noticed. If I report these players via in-game report, nothing happens to them. If I report them on the support site, their accounts suddenly stop spamming that 42% win rate soloq climb. Just hings I have noticed throughout the last week of enjoying my smurf. Let me know if you have had similar experiences.