The company's definition of abuse is somewhat open ended to my understanding. Pilots are provided 240 hours of sick leave which counts against flight pay. 100 of those hours are currently un verified meaning you don't need a doctors note.
I have no idea what they mean by abuse.
My sense is that some pilots have used all 240 hours.
Again I think if there is actual abuse, the company has a personnel department to handle that. The company should not be trying to paint sick in a blind canyon. The pilots union should not have accepted the company's data without 100% pushback.
The pilots should not vote for degradations in sick language. The FAA has an IMSAFE checklist of things you should not legally fly with. This flies in the face of that.