We have always enjoyed exploring the "world," which often means visiting the many resorts to eat, swim, and explore. I've never really thought of visiting a resort as "stealing" parking spots from someone staying there. We often park at the Boardwalk hotel, eat at Flying Fish then walk through the International Gateway to visit Epcot to end our day. We do the same thing at the Contemporary eating/drinking at the California Cafe (some of the best night time views at WDW) then visiting The Magic Kingdom....using the walk way to come back to our car (or back to the bar if it is still open). We also like to visit Narcoose's before taking the monorail to/from the Magic Kingdom.
It's never occured to us to move our car once we finished dinner/drinking before heading to the park.
Next time I will be very specific in telling the guard that we are visiting the California Cafe then the Magic Kingdom.
Based on the answers I guess the walk way is still there available to guests of the hotel or DVC property.