It is difficult to deal with unethical practices when they surface in the workplace. The hardest part may be simply raising the issue with your co-workers and/or supervisor.
In my own personal experiences I have unfortunately had some coworkers who had some unethical practices. Luckily I was okay with talking to my supervisor and bringing it up. However it did make me realize how important it is to mind the unethical practices as they can lead to many more issues.