Nadeem Zahid wrote:

Specifically if someone (non-pilot) wants to rent an airplane (also if
he can rent at all?) or pay for that rental and requests for free pilot
service to pick up his son or daughter, will it be violation of the FAR?
IMO it will be...

You are correct. There are two things you need to be aware of. First, there
needs to be a "common purpose"; that is, the pilot must at least claim to be
going there for the same reason as the passenger. This is based on case law and
will not be found in the FARs. Second, the pilot must pay at least his or her
full share of the expenses.

George Patterson
Give a person a fish and you feed him for a day; teach a person to
use the Internet and he won't bother you for weeks.