Depends, if it’s some building and you want to take a fancy lampshade. Do it, just don’t get caught and don’t brag.

If it’s the palace at Knossos and you’re sneaking past Greek customs by night-time packet boat so you can rebuild an entire temple inside your museum at Oxford, maybe don’t

Reasons to leave things behind…

1. If you’re caught trespassing with something from the site, you can get tagged for theft as well
2. Not knowing what you’re messing with and it hurting/killing you.
3. Bragging about something salvaged and causing a rush to finish reclaiming stuff from the area. More people, more attention, more authorities, etc.
4. Needing to leave quickly and having extra stuff to carry can get you hurt or caught.

Reasons to take things…

1. You want it and you can.

that’s how you become a cordyceps zombie