Transforming into a werewolf or Vampire Lord DG form, or transforming back into your natural form (there will not be a second bounty if you are witnessed transforming both to your beast/vampire lord form and back).
Starting a fight with a non-hostile NPC (except a brawl). Red on-screen text attending an action option indicates that performing that action would be a crime.
Stolen items will be confiscated from you if you are arrested and jailed, and can be sold only to fences.
Red text in inventories indicates that taking the item will be stealing.