Most educators will tell you that tenure is an honor they strive for with their employment. It means they have proven themselves to be a very good instructor and that they will be allowed to continue working there for a very long time. It means they have job security and they can invest in their future without worrying about future employment. Not everyone is happy with the process of tenure though.
You will find plenty of reports filed by individuals that feel their rights have been violated once they earned tenure. They were threatened by the school to have it revoked if they continued to express their personal thoughts on various issues. This puts an individual into a very compromising position.
Some individuals work for the full five years that are generally required to be eligible for tenure, and then they are denied. They are never fully given the reasons why in any document. The evaluations for tenure decisions arent open to the public and the information discussed is not recorded. Many individuals feel they were prevented from earning tenure due to the words of other instructors or to save the school money.
There are plenty of issues out there...