1. Firstly you should understand the legal position of the property.
Your grandfather has transferred his property by a testamentary disposition i.e., by a Will.
The procedure for enforcing the Will and acquiring the property so bequeathed is that the beneficiary has to apply for transfer of revenue records to his name by submitting NOC from legal heirs or have to get a probate order from a competent court of law.
Therefore be aware that the property has not yet been transferred to your father's name, hence you cannot say that you need not obey the law or comply with the legal procedures that are to be observed in this regard.
2. Do not stretch your imagination and or ask questions which do not have any legal value.
You should be concerned about what is to be done and not be worried about an incident that may take place after 30 years from now.
Your father should have got the property transferred to his name by complying with the legal requirements, since he is no more alive, the successors to succeed this estate need to follow the due procedures of law.