Unruly behavior of employees with safety officers

 I heard many times from my friends in safety department in various government and private organizations about the tough talk and occasional insulting behavior by those in the production line when discussions take place on safety issues. The hazards identified are ignored with a sarcastic remark that safety officers do not have any other job other than pointing out and the hazards pointed out are often not considered fit for action. They do not try to learn from incidents happened elsewhere saying that it is too theoretical and will not happen in their plant because of their confidence on their management skills.
We have ignore the unruly behavior of others as it is not in our control and we should not get disappointed and stop doing our job. We have to collect case studies of other organizations that resemble situations in our work place and keep circulating to all employees including top management for information.
We have to be bold and if required we have to take up to the notice of higher authorities when junior level people do not listen. Most of the time, people will sit straight when issues are put in writing with a copy marked to group heads and CEO or MD. I am sure this will help over a period of time in controlling unruly managers.