During his years in hiding, when no one came to help Voldemort, none of his Horcruxes actively helped him. The fact is, the Slytherin Locket, the Hufflepuff Cup, and the Ravenclaw Diadem were hidden and would have stayed that way if no one had collected them.
The worst part is if Voldemort dies first, then most of the Horcruxes would have stayed hidden, given how well-protected they were. Hence Voldemort would remain dead. Am I missing something, or is there something very dumb about this?
Horcruxes only make sense if they can somehow intuit the master piece of soul has been destroyed or is in serious trouble. In that event, they should automatically activate. If not, this seems to be an unnecessary waste of time.
I am guessing, if Voldemort himself is the first to die, some knowledgeable wizard would have to perform the whole boiling-liquid-blood-of-enemy-servant procedure, like at the end of Goblet of Fire, and instead of a weakened Voldemort, throw in maybe the Hufflepuff Cup or the Ravenclaw Diadem.