Oh, well, if you have never heard of it happening, that must mean it never happens. 

Because each bishops is different--ideologically, politically, personality, etc, each diocese will have different policies.  I have seen this happen. In one diocese, divorced and remarried Catholics might be fired.  In another diocese, they might not be.  I note that it is the same with gay employees.  How to deal with that is not universal.  

Gay "marriage" is all the rage right now.  It is the new, hip cool trendy thing in pop-culture.  Because of this, gay employees who get fired, etc, are going to tend to get the attention of the liberal media.