Of course. But you also need to make sure you don't accidentally count the non-malicious bots that have known UA strings but just happen to crawl all over the p

Of course. But you also need to make sure you don't accidentally count the non-malicious bots that have known UA strings but just happen to crawl all over the place, including ads. I mean it's a good (and cheap) first pass to throw out quite a number of true positives.