The amount of traffic pissed away by bots infuriates me at times.
One of our client sites (which is a small business that isn't that old and well known) was basically getting smoked every night by them. We ended up just blocking India period and that caught 80% of it. The bots were targeting a particular Wordpress plugin that was difficult to cache due to it being search-result based. I worked out that the bot formatted its url parameters in a slightly unusual order so put a security challenge on that pattern and that caught a lot of the remaining shit.
Cloudflare periodically sends me amusing emails about how alarmingly high a percentage of traffic is being blocked.