The phrase "morally bad" is grammatically correct and can be used in written English.
It is often used to describe an action or behavior that goes against accepted ethical standards or principles. Here is an example: "His decision to cheat on the exam was morally bad and showed a lack of integrity."
And one such concept might be expressed by a use of "morally bad" of a kind associated with moral philosophies that Hare would otherwise reject.
Perhaps she thinks that for something to be morally bad would imply or presuppose that human moral attitudes manifest a kind of uniformity, while thinking that in fact attitudes do not converge (Burgess [1978] 2007; see also Smith 1994a: 187–189, 2006, 2010).
For instance, an animal may be said to have moral status if its suffering is at least somewhat morally bad, on account of this animal itself and regardless of the consequences for other beings, and acting unjustifiably against its interests is not only wrong, but wrongs the animal.
Accordingly, morally bad habits — including corrupt actions — are extremely corrosive of moral character, and therefore of institutional roles and ultimately institutions.
"It's not like they are morally bad.
It's an insistence that people who hold such views are morally bad.
Obama called racial profiling "morally objectionable," "bad police practice" and a method that mainly served to "humiliate individuals and foster contempt in communities of color".
Workplace bullying is morally repugnant, bad for business and it seems to correlate closely with sexual harassment.
But at last there is real hope that another generation of students won't be deceived, abused, abandoned, and have their financial futures ruined by the morally reprehensible bad actors in the for-profit college industry.
The question is what someone will choose to do with those feelings (eat chocolate or strawberry, partner with this person or that), and whether any particular choice is morally good, bad, or neutral.
Few moral philosophers, however, have exploited the idea that actions might be morally good or bad in virtue of being good or bad of their kind - good or bad as actions.
