Interesting idea! A different way to think about it -- how about gathering a ton of cheating videos and starting an archive for it in a Discord? You could then invite mods in to analyze those vids and create a comprehensive list of cheating methods and rating of difficulty to spot cheating in each example. This could end up being a really nice google doc or tutorial video for mods. Sounds like something EZScape would be into, as well.

I guess new mods could be tested on it, but that doesn't sound feasible yet. I'm not sure how many new mods would actively want to test themselves.

Moderation isn't a job. It's not a title earned by being a good moderator, whatever that means. Moderation is something given to anybody that wants to do it basically. Anybody that wants to put up with the headache. If a moderator wants to test himself, maybe he should arrange that with someone else. There doesn't need to be some training/testing done before you can get mod status because guess what? Being a mod means nothing.

Also I got some bad news for ya. There are a ton of games out there that can be cheated, and you would never catch them. Why? Some games are just easy to cheat in. Often comes down to how easy it is to splice, or maybe the game can be played at near TAS level, meaning you can't rule out a "perfect" run, meaning you can just cheat the "perfect" run.

No amount of showing you a cheated run will help you catch it. Every game is different. I can show you a cheated Castlevania run and you wouldn't know what's wrong with it. Even if I told you what's wrong with it, you still probably wouldn't catch a similar run. There isn't anyway to really train for these things, you just have to know the game better than the cheater.

Lastly, as usual, cheating is overblown. It's not as prevalent as some youtuber somewhere might have you believe. Cheating does happen, yes, but it's a very small percentage of runners. I'm glad the rule was put in place to ban people that test moderators like this. Simply put if your fake run gets verified it doesn't mean anything. It doesn't mean the moderator didn't do their job, just that they couldn't catch the cheat. The only truth at the end of the day in that situation is that the person submitting the run cheated, and should be banned for it.

There's a youtube series called "spot the splice", that's kinda what you sound like you're looking for...