update: pretty exhaustive summary of proposed solutions and their flaws here: https://www.youtube.com/watch?v=SgkgsgaBBCA
Valve has been building a new generation of server side anti-cheat, that is powered by neural networks, but it’s only in use for Counter Strike 2 AFAIK.
I mean, I get that if you block current day bots, somebody will make a new bot that escapes detection -- but kicking the current day bots seems like a mighty improvement to me.
The community servers window in TF2 itself shows how many bots each server has, next to the player count. What's that then?