Could be bots or misclicks. I accidentally downvoted a comment just a few hours ago. It felt surprisingly bad even though I quickly fixed it.

I think the point is that you can’t trust any software. Hardware you can only trust if you built it yourself from simple logic components like transistors. Not sure how you would observe network traffic on that basis, but it’s probably physically impossible to do because it would be so slow that you would die before you finished checking just one day worth of HTTPS requests.