If you think about it, you don't really need to know someone to figure out if you trust them or not. There's a lot of subjective things that will easily tell you if someone is trustworthy or sketchy. If people possess some of these traits, it's safe to say something's up.
1. They don't like music
How could anyone not like ANY music?
2. They don't like animals
Instant no-no. If you don't like animals, I don't like you.
3. They don't like rain
I get not standing in a downpour, but watching the rain is always therapeutic.
4. They don't like cheese
J'aime le fromage, me gusta el queso, ik hou van kaas, I love cheese.
5. They don't like holidays
Get in the spirit or get outta my life.
6. They don't like chocolate
I mean, you don't have to be obsessed with it, but how do people hate chocolate? Do they also hate themselves?
7. They don't like Disney movies
Self-explanatory.
8. They don't like Jessie's Girl
Look, I've never met anyone who doesn't love Jessie's Girl by Rick Springfield (except my dad but I'm pretty sure he's lying to seem cool or something). People who don't love Jessie's Girl are aliens. Traitors. Scoundrels. Dangerous human beings. Untrustworthy.