2 ms·

This is entirely honor system, though. All of the user-agent checking has to be layered with the other bot-removal techniques. Malicious users will always fake

• tripzilch 14y ago
  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.