As programmers we are always attuned to thinking about the edge cases and endgames, so I wonder:

Would be possible that such a fungus proliferated into a sort of "termite for plastic", feeding on plastic piping (in houses or cars maybe) and the like.

Of course house owners already deal with mold so I suppose this would just be another one.

The article suggests introducing it into landfills to eat the plastic. Kudzu was introduced to America to control soil erosion. The invasive vine now spreads at a rate of 150,000 acres a year, so it certainly accomplished goal A.