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I'll add my two cents.
Let's start with the main point: I have a purely neutral attitude towards Gomunguls – we didn't play together, we didn't communicate much, we didn't clash in forum arguments, and he didn't sign up for my Tournaments. Just to nip any possible speculation in the bud.
Based on several indirect clues from reports/streams/statistics, I've had a nagging feeling about him for a long time – something just doesn't add up. There's a dissonance between his gameplay, results, and the way he expresses his thoughts.
Back in the day, when I was actively hunting for maphackers, this feeling helped me save a lot of time searching and analyzing save files.
Of course, it didn't always work; sometimes it gave false alarms when a player was genuinely playing illogically (in my opinion) but was just on a lucky streak.
For example, around 2010, I reviewed a series of games from FireToSky, and he quickly started showing a level of skill that was unusual for a beginner. I looked into it, and there were enough strangely lucky moves, but I couldn't find any concrete evidence. Then I watched his game at the CIS-2011 tournament, and I realized that he really does play like that – he can quickly build up a strong base with a red rush, leave a large army near the opponent's outpost within their line of sight, etc.
But I was also right quite often, so when I had this feeling, I would ask the player's opponents for save files and review them, sometimes briefly, sometimes in detail. And many times, players themselves came to me asking to review their opponents' save files. Interestingly, it was usually the opponents that I had previously gathered information on. Apparently, I'm not the only one with this intuition.
That's what I'm getting at – if there are any suspicions, you shouldn't immediately start stirring up trouble about morality and ethics, or starting pointless arguments. You need to ask players (preferably privately), study save files, not with the goal of finding compromising evidence (that actually hinders the process), but with the goal of studying the player, understanding their thought process. And based on that, you can judge whether there's anything there or not.
But you shouldn't dismiss it, hiding behind the presumption of innocence. At the moment, it dampens this issue so much that only very stupid cheaters can get caught. A skilled player can cheat without being obvious, because over the years of discussing these issues, the arguments for accusations and the methods for finding maphackers have become too well known, and they can easily be avoided.
Because if you dismiss it and punish the accuser, it will only lead to those who thought the same way but didn't have any arguments silently ignoring the suspect. That's not what we want.