Building analytics from access logs is massively unreliable. I have a few domains that answer for http traffic but only serve "Welcome to nginx". When I tail the access logs I see thousands of requests from obvious bots, but also that traffic seems to be pretending to be other forms of traffic also.
There are some bots that pretend to be phones browsing around, IE, firefox.
Just remember that relying purely on access log analytics isn't something that will return accurate results.
I wouldn't call it massively unreliable from what I've seen so far.
For one it is offset by the fact that the site it is used on is Ajax'ed, so it is fairly simple to filter out those who poll just the container page and don't follow up with querying any actual content. For two, I'm getting good at detecting bots by simple filtering by User-agent strings and IPs. So it is far from the picture of an utter disaster that you describe.
There are some bots that pretend to be phones browsing around, IE, firefox.
Just remember that relying purely on access log analytics isn't something that will return accurate results.