I understand the "play to win" mentality in tournaments but you have to get past the "play" part (which I won't even get into the problem with SOS with someone forfeiting). I miss the days of "Fly Casual."
I missed the part where "Fly Casual" meant ignore the basic activation rules of the game.
Your point about possibly being accused of cheating is a valid one but its also a double edged sword. If you start calling someone a cheater or start accusing them of not following the rules when the rule in dispute has nothing to do with the outcome of the game, you put yourself in a bad position socially for what is all intents and purposes is a social event.
So essentially if you ask your opponent to play by the rules they agreed to play by when entering event you've put yourself in a bad position socially? You don't see where that is a problematic position to take? I understand you are limiting yourself to rules that don't have anything to do with the outcome of the game, but who exactly gets to make that call? I've certainly seen players extend that criteria to many a non-mundane actions.
If I were a newer player entering a tournament and my opponent started moving all their ships at once I'd certainly ask them to stop, as I'd have no idea what the hell was going on.
The rules of a game are a social contract between two players. They allow two players that may have never met and have no trust between them to play the game without issue. When one player starts skipping over rules, with no consent from their opponent, they are going to very often make their opponent uncomfortable with what's going on. Clearly this is the case as that was what spurred on the OPs post in the first play. I believe it is very poor sportsmanship to put your opponent in an uncomfortable situation, I think it is even worse to throw some social sanctions on them for just expecting their opponent to follow the basic rules (which their opponent agreed to do when they entered the event).