@UnoDosi what if you know as every time the sus player is spectated he cant match his "normal" kill ratio??? is that a get GUD situation?? 1 guy is good for almost a 4 to 1 ratio most days but spectated can match a 1 to 1 ratio?????
I would think that the best course of action would be to build up a record of "pre-spectator results" and "post-spectator results". One could then build a reasonably large set to show a strong correlation to spectating and a decline in results.
That said, it would still be correlation and indirect evidence and short of a god-level data set or otherwise, I doubt that Banzore would issue a ban. (I am a mere player and have no affiliation with banzore nor knowledge of their internal policies.)
(AKA: I assume that Banzore's level of determination is probably somewhere akin to a video game version of "beyond a reasonable doubt" lol. Maybe more than "by a preponderance of the vidence" but less than "beyond a reasonable doubt". lol )
build the evidence and present when you believe it is enough and is in a tangible form, even if indirect.