This would make a good basis for a Black Mirror episode. Ask the question, "How far will they go to hold you to task if you don't complete your goals, or what happens if you lie?"
If the officer submitted the DNA as if they were a customer of the site, I wonder how they complied with the company's sample collection process. You usually have to submit a generous amount of saliva or cheek swabs.
The forum spam problem is easily solved if you ask a question during registration like: "What are the last four letters in the name of this website?" Anything that requires momentary thought from an actual user, and is specific to your website, will throw bots off.
I'm reminded of the Tesloop episode of 'The Pitch' podcast. "Haydn Sonnad pitches his plan to revolutionize regional transit on the back of Tesla’s electric charging network." https://gimletmedia.com/episode/11-tesloop/
For those of us who live in Fresno and are curious as to which neighborhoods are being targeted: Harlan Ranch and Fancher Creek. They say "communities outside of these areas will not be affected."