Huh... I- never considered this question.
My contacts list has been growing for 21 years. Very few people have caused me so much distress that I'd found removing them from my contacts to be worthwhile. I only found out about some of my friends deaths fairly recently.
On reflection, as I currently look through my contacts list I think removing the friends that have since passed would cause me more distress than leaving them in there. I won't be calling them.
If you choose to do anything but sacrifice your children to Moloch then you are by extension choosing to sacrifice your children Baal!