Time for me to add some more info:
MB confirmed that these are randomly spawned, however some have been placed in static locations on certain planets. MB has confirmed this.
Crashed ships like Anacondas are also static, and do NOT trigger your scanner for a POI, however they CAN be seen from a significant distance.
This would lead me to believe that those that have been placed, will not trigger the POI indicator, and you will in fact be able to / have to see them while flying around.
When I get back to human space, I will drop my Anaconda for my clipper for it's non-SC flight speed and good cockpit view.
- Fendalton