Can you crop a friend out of a photo to use for your Facebook profile picture?

What is the etiquette on this? Just edit this page and add your thoughts.
*If the original photo isn't anywhere else on facebook, then it's fine. If it's already on facebook, then don't do it.
*This also depends on whether or not the other person was an active feature in the photo along with you. If so, then it's best to incorporate him or her within in. If not, (if you're the main or only focus of the picture), then it shouldn't be a problem. 
*IF your no longer friends with that person and speaking terms than go ahead BUT if this is a good friend of yours, think about her or his feelings when doing so, let them know that your going to before doing so especially if you did not that that photo.
Category:Facebook Etiquette
Category: Profile Page
Category: Profile Picture