Bacteria Can Eat Plastic - Could This Make Oceans Cleaner, or Worse Off?

Here Great discovery/invention. Now scientists have to work on the 'application.' A thought comes to mind: putting the bacteria into the giant plastic trash heaps in the ocean sounds good, but perhaps breaks down the plastic to smaller levels where it gets diffused through the the water table. Perhaps creating more problems than it sitting in state, where perhaps eventually it can be collected and dropped off somewhere, like in a dump featuring the bacteria?