The site Paranexus.org promotes the axiom, “Do no harm.” All paranormal investigators need to have this tattooed on their minds.
We are dealing sometimes with vulnerable people (some of whom may be suffering from depression, bipolar, or be potenially suicidal), situtations of recent death where the grieving process is still being gone through, situations in which people may have to leave their home or workplace because they believe something malevolent is occurring.
We have to think carefully before we wade into these situations. We are not trained health professionals or full-time social workers, and the paranormal investigation thing, at the end of the day, is a hobby interest. We must always maintain that perspective.
We can act professionally, but we are not trained professionals in this field, and we are altogether unqualified to deal with some of the human situations and conditions we may encounter.