I don't really think there is much that can be done about this. For a while (and perhaps still) the CMs were telling people to ride the SSR bus from any park to get to DTD as well. Truthfully, if you are a ticket holder or AP holder, you are entitled to any forms of transportation Disney provides. Even with the gates up at all the resorts, you are allowed access for just about anything you desire, so to me, they are there to deter people from using the parking lots for simply park parking, but are NOT there to deter traffic. Especially SSR, which DVC is currently marketing. They would never want to limit who could come through for a look if it might mean a sale.
Hopefully it won't become something that is very popular. My time is worth money to me so I would NEVER go this route to try to get around paying to park. Heck - it takes long enough to get there when we drive right in or take a bus from a resort lol I would NEVER want to have to add a walk at the end of my evening or the start of a new day!