I don't want to search through these baords, the search function is horrible.
But I've in in PB&M for 2 1/2 years and I've seen alot of cases of behavioral smites from rioters, including person claiming they didn't int as 0/0/0 but rioter came on saying that they repeatativly pressing "S" to stop auto attacks, not lvling skills to purposely do less dmg and clicking in locations that he normally doesn't to purposely miss skill shots.
I've seen leaver buster punishment smites for just clicking around the fountain and around the towers in attempts to fake out the system.
There were cases in Turkey server that people were getting chat restrictions with nothing in their chat logs. There was a large outcry for clarity and Rioter came on and said that their toxicity was all in pre / post game chat.
LCS QAs can see all the buttons pressed and they use that to debug issues. listen to the caster's comments on the first C9 vs FlyQuest game in 2017 spring, MF ult bug, FLYQuest on blue side as MF+malz vs zyra+ashe (I think it was ashe).
Some of the older members can probably tell you guys a few of the other cases if you can get their attention here.
So can I give you evidence? nope, I'm not going through all that work. Am I going to tell you to believe me? Yeap, if you choose to believe me.
If not, whatever.