I've created a relatively large cell, and now when testing I realize that EVERYTHING is takeable without repercussions on the player. I just want everything to say "Steal" instead of "take", but I don't know how to do it. I tried setting the cell to be owned by someone, but that didn't work.

Don't know why setting ownership didn't work. I can't look right now, but if this isn't resolved I'll look when I get home.

If you want everything to be owned by a person or group of people then you can set ownership of the cell to a specific faction and make a crime faction within that faction. Without a crime faction everything is take-able even if it's owned by an Npc. (To make a crime faction go to the crime tab in the faction options.)

That's what I was looking for thanks.