I know recently a question was answered about plug and someone eluded to plug cracking if it the ball rolls over it. In my experience that is such a rare, remote possibility that it isn't worth considering. If a ball is plugged properly it should last as long as the coverstock does.
As long as the plug isn't on the backend flares of your ball roll, the plug won't hurt anything.
Little known fact: In Russian "Hope" and "Change" translate to "Tax" and "Spend"