1. You wear a Bonnet with a label “Baguio City” on it.
2. You are familiar with “Burnham Lake” and “Mines View”.
3. You buy “Peanut Brittle” because there’s no place in the City to plant Peanuts.
4. You know what is “Baguio Beans”, ask the locals if Baguio beans really came from Baguio.
5. You are a fan of a any Popular Filipino Artist.

Feel free to add to the list.

you are amazed na yung mga puntod ay nasa backyard lang

You don't know how to speak at least ilocano.

Probably not if you have an local dialect accent. Unless English yan heavy accent take for example Apo Mayor Domogan.

you don't know any restaurant that serve dog meat.

you are not familiar w/ caÑao