There's well analyzed video of a pro player streaming who got temporarily banned for something like this. It might not even have been pre-fire, but post-fire at a different enemy retreating at the same position
Valve need to tweak the model so that it requires a higher confidence level before a ban, and to reduce false positives in their data capture methods. This is a mistake but doesnt kill the idea.
https://youtu.be/SFyVRdRcilQ