I led a Guild for Mod users exclusively for several months. I picked up everyone on this forum that was looking for a home. And we were very selective and careful. I wrote guides on our discord server about what to do and what not to do to get caught.
And yet, people finished Rank1 overall at the end GAC tourney's for their Division. People would still get top3 rank in ships with HALF of the GP of their peers (Think 3star Executrix in Rank2 with 6star Executrix/Home ones at Rank 1-10). I saw people get contacted over suspicious victories via DM. I've been a part of shard chats and seen people get massively reported .
Call it a fantasy all you want. But I've personally witnessed 30+ people get banned in-game. And when the Admin of one of the largest SWGOHDiscord servers posts this:
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I'd be careful.
And for the record, swgoh.gg is not the only means to track your account. If you join a guild that runs DSR Bot, which is pretty much a given for any guilds running GeoTB, your data is available to them and anyone else with access to that Bot.
But be my guest. Run the mod and beat whoever you want. It's not my problem. I'm just relaying advice to warn folks NOT to do what 30+ others did to get banned.