I think this is the ideal situation for waste to energy. CRI has a program in place that we sort out every recyclable plastic type that we can. We are than left with the plastics that would otherwise find their way to the landfill. Instead of dumping plastic waste in the landfill to sit for; well pretty much forever we process it to be used as an alternative fuel. Assuming that the waste to energy facility has the proper filtering technology it is pretty much a win, win situation (in my humble opinion).
There is of course a negative side to this. Some companies seeking out the zero waste badge who are doing it more on a merit of recognition than stewardship for our planet may sometimes ditch the sorting efforts and just include it all to be an alternative fuel source. When the sorting and reclaiming of recyclable material stops the forward progress of waste to energy is lost.