What is the ruling on converting an old cemetery, where burials have ceased for over forty years, into a children's playground, and then into a youth gathering place where beverages are sold, parties and weddings are held, and matches are broadcast?

Old cemeteries are one of two cases: Either they have been thoroughly examined and no trace of the dead remains, in which case it is permissible to utilize them in any lawful way. Or the bodies of the dead are still present and have not decomposed, in which case it is not permissible to utilize them by building upon them, or modernizing them, or the like; because they are rightfully belonging to these deceased and dedicated to them. If the utilization is permissible, then there is no harm in exploiting it in any lawful way. If it is not permissible, then it is obligatory to advise the officials of the necessity of removing the gardens and buildings erected on it, while choosing the optimal approach and gentleness in giving advice.