1

Security is unexpectedly high, or something is a cover for cult practices.

2

This job advances the secret agenda of a third party, or a dangerous gang uses the location.

3

The crew has been lied to about the nature of the target, or the job is a trap laid by their enemies.

4

Requires long distance travel, or free spirits haunt the location.

5

Target moves around (site changes, etc), or the job requires expensive or rare gear.

6

The client is double-crossing them, or a powerful supernatural entity is involved.