I think it's static inasmuch as it isn't an inherently adversarial problem. The world isn't bent on thwarting self-driving cars. Bot authors are bent on subverting detection.
Oh, that'll come.
They problem is so ill defined that it sometimes has to be modeled as random events instead of a deterministic physical process.
Bots on the other hand changes constantly - what is the definition of an abusive bot? What is the definition of spam? The adversaries on Twitter adapt not only their tactics but also their goals.