Perhaps an abbreviation would be the best of both worlds, and debug strings should be prefixed with "DNS"

You won't need to submit that particular string working at Google, right?

Related in terms of being easy to search for, I use the abbreviation "TK" as a placeholder for text or incomplete code. Took this from the publishing industry (my partner worked in magazines) -- it's a combination that does not appear in regular English and so is easy to both see and to use search tools for.

The automation which can check for do not submit itself is hard to submit. Or at least updates to it are hard to submit.

> You can't automate checking for random strings, right?

No, but you can make the string configurable.

Well in the LLM era, you could. I’m not sure you should :)