Most beings are harmless unless you attack first. [Even though Alec's used to think of the 'harmless' ones who need protecting as having a more human form, he understands how others can see a 'monster' and react.] I try not to react based on appearance or some actions. Some beings can't control what they are or what happens during certain times.

In my world, I protected beings that people thought of as dangerous. I don't see Toothless as any different than them. Even if he was doing something that was dangerous, I'd try to stop him, not harm him.

If he was a dragon demon then my partner and I would be concerned.