This basically started as being helpful, while you're at the park, sort of thing sure I can pu something for you. And, usually the ones that could offer an ongoing wishlist pickup, are those that have an AP. I wouldn't be surprised if it started with someone offering a person an AP to do their shopping, and the perk was they had an AP to use whenever they wanted. I'm guessing this is considered a personal shopper for either a Disney collector or a store/online seller etc.
Now that this has become an issue with Disney, probably because of complaints by guests at the parks, (which could also be other personal shoppers), it's a risk for those who offer to do any pickup unless it's for their personal use. So is the remedy then on the part of the people they're doing pickups for? Just a question/thought, but doesn't this become a gratuity situation? NOT a suggestion, just trying to keep this in perspective. (Hmm this sounds like the increased pricing online, before the gouging?)
To also keep in consideration,, as guests/APers run around picking up multiples of anything, it's not the pleasant day at the Parks as some might think,although they might try. When people sign up on a wishlist/pickup, i.e.a pin at cost plus tax, fees, shipping, this is not including time, parking, frustration/lines, or the ticket/AP/cost of event. By the time you finish doing a pickup, providing you're able to get any, you've just spent your morning prepping and going through a Black Friday situation weekly. It's never known as to how crazy or not it will be until you're there, regardless, the adrenaline is going. The hardest/conflicting part is telling someone they didnt/couldn't fulfill their request, and disappointing them. The rest of the day is more of trying to get a breather, confirm what you have, or if you missed something, at that point it's been like chasing a 5 year old to different stores within the park for 3-4 hours. : p. Then it's taking the treasures to sort, package, and mail.
After a good pickup there is a feeling of accomplishment, triumphant success, and Happy over the achievement of making others Happy as well!
Dawn, Connie, and Merlin, including anyone else that offers, truly do this for the HAPPY!
Hopefully this is just a Disney deterrent but no one wants to risk their AP that they have or are paying for to be lost for a year over a favor. I'm sure no one would want that, and understand they themselves wouldn't jeopardize another person to be on a Disney block out list.