This implies that you are familiar with the system and aware of how it's abused, so presumably you can provide some evidence.
I wasn't aware of any during my time there, but my personal experience doesn't necessarily mean it didn't/hasn't happened.
The keyword is "Day 1 CPT" if you want to learn about the abuse.
Certain colleges basically knowingly wink wink and allow incoming students to go immediately work under CPT.
In my opinion, it would have to be obvious and fairly extreme to take action over, because there are issues that dwarf whatever impact it might have, the top one being bureaucratic bloat. If 90% of the non-teaching/researching staff at Berkeley were replaced with CPT abusers, I think it would be a net positive.