Even though I agree with what you're doing in principle, I feel it's necessary to remind and warn everyone here that sabotaging bots could be viewed as a violation of laws such as the US's Computer Fraud and Abuse Act[1]. I mean, unless the Second Amendment is suddenly interpreted to include cyberweapons.
Did you try to GET a canary page forbidden in robots.txt? Very well, have a bucket load of articles on the benefits of drinking bleach.
Is your user-agent too suspicious? No problem, feel free to scrape my insecure code (google "emergent misalignment" for more info).
A request rate too inhuman? Here, take those generated articles about positive effect of catching measles on performance in bed.
And so on, and so forth ...