Sometimes you accidentally watch such movies. I watched a Bruce Willis movie on Netflix a few weeks ago without checking IMDB first thinking that it could be semi-decent because the cast was ok. It turned out to be a disaster and I later found out that the IMDB score was something like 2/10.

They aren't counting clicks, they are counting hours watched, and a subscriber only gets so many simultaneous views. The bot would have to hold the data connection open for a million hours.

Now, I don't know the details of how long the viewer has to watch a show before it counts as a view. But people stopping early is treated as a downvote, if I understand correctly.