I never knew you actually had to show a membership card to buy a logo items -- I bought two DVC hats from Saratoga and didn't have my membership card on me since I never carry it around -- it stays in the safe unless I'm going somewhere where I know I need it for a discount!
Speaking of seeing things you probably wouldn't be allowed to see, one time a CM at EE saw my wife and I walk up to get a Fastpass and they were out. He saw my DVC hat and said "Oh Vacation Club Members! Want a fastpass? Come this way!" He proceeded to take us around the front of the line and took us into the control room of the ride. There were a bunch of monitors in the room, with a lady watching all of them. He explained all of the parts of the ride and what they are looking at. One monitor was directly on the part where the track switches -- it actually flips over to a totally different section of track, not just move a little part over like I assumed. After sitting in there a bit and seeing the trains go through the ride on the monitors, he took us to the ride operator and said "These guests would like to sit in front!"
Needless to say, those who say that "magical" experiences only seem to happen to families with kids, well, that wasn't the case with us that day! We won't forget the little things like that make a trip special, and I wrote a letter to Disney with the cast members name to say what a great job they did, and that's why we bring others with us on other trips and will remain DVC members until our contract expires!
Sorry if this is partly off topic, but we might not have been picked by this CM if we didn't have our DVC hats on -- and this is too good of story not to share!