Seems to be a lot of mean spirited people on here.
It's give and take: I've taken in parcels for neighbours, especially a young couple up the road who are out at work, and others have taken in parcels for me when I've been out or away. I have no problem taking small parcels to the recipients, or in the case of the couple up the road, who have a security gate and 2 dogs on patrol, waiting for them to collect when they get home.
Mutual benefit I think, and saves everyone having to arrange redelivery or go to the sorting office.
By the way, our lovely postman always asks politely if we will take in others' parcels, he never takes it for granted.