First of all, none of my personal information is on this website other than my email address and my opinions about things, which probably can't be used to track the real me. It's not like Facebook where all your personal information is out there for everyone to see, which is why I don't use Facebook. That's extremely dangerous in this day and age.
Second, this site is paid for through advertising revenue, so the bots are helping in that respect determine what ads to run.
Third, we have more important things to worry about, like a teacher in England being forced to apologize for calling the students at an all girls school, girls.