Bahrainlad, that happens loads of times........
And you can reduce on the contingency fuel aswell by re-file in the air once you know you have fuel for the original (further) destination. But not in any way it's a diversion, it's standard practice to do this.
Yeah you're right about that one HT, especially if this flight just levelled of at FL120 for their diversion to ALC, without 'proper clearance' coming back to the original topic.....