It was global news because a future queen was involved, but it received scorn because it was essentially a crap stunt. Before the tragic aspect of this story emerged, the newly crowned king of comedy Jack Whitehall tweeted "I mean sachsgate prank was crude but at least it was quite funny. That Australian Radio hoax call was rubbish. Hope those DJs get sacked".
To lay the blame entirely at the feet and Michael Christian and Mel Greig is to overlook a far greater contingent. It's to overlook the fact that the radio culture actively encourages the pushing of boundaries, that it clearly considers the feelings of the victims secondary to global stature and revenue.