With killing this community I was specifically referring to locking it.

Doesn’t seem as that big of a problem, that it would warrant migrating. Intentionally killing this community seems to be overkill.

If I can’t see it, is it really there?

You can block the scrapers useragent, tho that won’t stop the ai companies with a “rapist mentality™”. Captchas and other anti-automation tools might also work.

The only way I see is to poison the data. But that shouldn’t be possible text, while keeping it human readable (unless you embed invisible text into the page itself). For pictures on the other hand you can use tools like nightshade.

What do you mean by that? A community?