A buried body decays slowly then once exposed to nature. The skeleton of a human takes very long period to decay. the only way to accelerate it is either burn in or pour some acid to it. I never heard of it happening anywhere in the Muslim world. We treat our dead with utmost respect. Desecration of a dead body is big sin in Islam.
It is time that the living is also treated with the utmost respect. With the population increasing day by day,land is becoming scarce. More and more prime land is being occupied by burrial grounds. Body being decayed is also desecration. It is time that we separate the rhetoric from the factual and think logically.