I'll also ask what do you mean "explode"? Actually fracture into pieces, bearing failure or just the freewheeling mechanism either seize or freewheel both ways?

Anyway, yes, periodic overhauls and relubing should be done for cup-and-cone hubs and periodic relubing of the freehub body is also recommended. Will they last forever if you do it? Of course not but they will last a lot longer than if you don't. Tedious and time consuming I suppose if you aren't willing to put a couple of hours a year into maintaining your bike.