I used the ultimate Nginx bad bot blocker on a couple of my side projects, and it is a pretty good project https://github.com/mitchellkrogza/nginx-ultimate-bad-bot-blo... . Apart from the Cloudflare offers UA blocking and AI driven bot management too. Most of these bots are for content scrapping and then creating search spam results. I am a one-person show, and it hurts both financially and resources wise on my tiny severs. So I block them.