Not sure what the government getting it right has to do with workplace violence, this article is strictly about drinking on the job. Do you have a specific incident that you feel UPS has not gotten right and an article supporting that the government has taken a different course of action?
As for the article, it references an appeal process that the employees can go through to get their jobs back. While union employees would have a panel and non-union employees would have a process to challenge their termination, it would be nothing like a government appeal. I think everybody would agree that termination for drinking on the job with UPS is not something that can be easily challenged.
I am by no means stating that UPS is perfect, but if you are going to use an example to demonstrate a point, use one that is relevant to the point you are trying to make. If you have a situation in mind where you feel the zero-tolerance policy was not followed, there is a website and phone number that I would encourage you to report it to. Note that the disciplinary action in this article was a result of conduct being reported to a similar website.