There should be no discrimination, if you a non activist and an activist did the same thing (posted same shit on FB) then you both should have the exact same treatment. What I read from this and other articles is that management goes hunting for reasons to fire people they don't like. In this case someone posted about bad work conditions and got fired, in other casaes people posted "wrong political thoughts" and got fired, maybe there needs to be a reasonable reason for firing somebody and there should be a body that would have the job to try and defend the worker.