I checked, so they did not opt out, but ther IPs are way off their home location as they moved around meanwhile ,which is the downside of IP based location services.
Just to be very sure if I understood right...
If I drag my icon, the flag "__manual" will be set to "1" in the DB table. This causes the IP based location service to stop updating the location. If I want to have my location updated automatically again, the flag in the DB must be set to "0" again. To be done by admin only.
As long as the flag is set to "0" the service will update the location regularly. Based on what schedule? (I can't change anything in crontab)