Most actually do have something like that. You will have to look in the Umpire Section of each rule book. They specify the duties and powers of the umpire. Most are written like USA "The plate umpire shall have the authority to make decision on any situations not specifically covered in these rules." Only difference is who is responsible. For example, the USA and NFHS give the plate umpire a little more authority, while NCAA every umpire is the same when applying these things.Don't get me wrong, I'm not supporting the tactic, I just don't believe there is a rule that would provide the umpire the ability to return the runners.
So can the umpire return the baserunners and eject the coach/player if deemed unsportsmanlike, yes absolutely. Since, this type of interference is not directly covered in the rule book. However, before that call is made, I would have to absolutely sure the intent behind the play. I do not remember who, but someone mentioned the coaches jumping up and down and high fiving immediately after this happened. In that case yes, I would probably send the runners back and warn the batter and coaches, since it was deliberate. If I think it is just a batter that lost the count and ran down, then I would simply call the runner back, in this case time would probably be called, so all runners would be going back to last base legally touched anyway.