I am a DVC member at BLT and I can't begin to tell you how many times I have sat on my balcony and watched the large number of people who leave MK at closing, walk over to the BLT parking lot, get in their cars and drive away. One morning we watched as two vans parked in the handicapped spots, unloaded their various
ECVs and rode over to the MK. One day my DH and I returned to the resort after grocery shopping and were thrilled to find a spot relatively close to the front door. As we turned to pull into the spot, we found a man and his wife standing in the spot. When my DH asked him what he was doing, he said that he was "saving the spot for his son who was coming later with the kids". My DH asked if they were staying at the resort and the man replied that they were not but this was cheaper and easier than using the MK lot to park.
We have complained on numerous occasions about the parking situation at BLT so I am not surprised that Disney is considering a parking charge for non-resort guests.