Playing devil's advocate here -- because I believe I do know what you're saying and for most practical purposes agree -- but I would argue that because morality is more nebulous than most people are willing to admit, it's not as cut & dried as you propose. If you need to ask if something is common sense or not, it's probably not...but unless you subscribe whole-heartedly to some didactic religious authority, morality can be much more situationally elastic than dogma would indicate.
