To me all those would involve people.....i like to photograph different objects and landscapes and all different stuff not just people
Then shoot the objects, or the tools of sin, or even the effects thereof. If you did want a person in the shot you could use yourself - as long as you have a tripod.
The 7 sins are a common project in photo classes, and I saw several variations on the theme.
The ultimate goal being that you push yourself to consider something - and photograph something - that you had not previously; that you get creative. That is when photography goes from 'snapping pics' to being honest art, which is, supposedly, why at least a few of us do it in the first place.