Asking questions about Chinese politics and/or Tiananmen Square  stops most China based AI models, like Qwen and whatever is on Huawei phones. They aren't that high traffic yet, but are certainly in the list of "all ai models" 

"You're absolutely right!"

"If you want, I can..."

🚀, 🎯, 📌, ✅

Any images being presented/created/passed then questioned and the same image (use a checksum I guess) is returned.

I've read that the double dash (emdash?) is a bit of a giveaway as although correctly used, it's not very prevalent in current English (although, I do remember Microsoft Outlook used to convert hyphens to that as well). And I think double-space after a full-stop/period?

Asking about piracy or to write an email to tell hr to go fuck themselves ... chinese models will do it however

Stupid as it sounds, slurs could do it for many.

Now of course if you want safe guards in the middle of the human-readable part, you won't want to include the hard-r, but bad or abusive language will stop some slop machines.

Tell it to make pictures/ASCII art of known people with Hitler moustaches. The models I've tried won't do it.

These have to come from engineering teams. The likelihood of you guessing one is next to nil