While I agree to a point, sometimes it's not a matter of looking for people that are faking. Sometimes they just fall into your lap. I know of at least three people that faked the need for a GAC or used someone else's handicap tag.
1. I have a coworker who made her first ever WDW trip a few years ago. She went down there with her sister, neice, the neice's husband, and their six kids. She told me the neice made a special trip to her pediatrian every year to get a note saying one of her kids was disabled, couldn't wait in lines, and needed a front of the line pass (even though there is nothing wrong with any of her kids). I informed her there was no such thing and even if there was WDW was not allowed to require a doctor's note. She spoke with the neice again, and the neice told her that a couple of years before, just a few days before their first trip, she had to take one of the kids in to see the pediatrician and the WDW trip got brought up. The pediatrician laughed and told her that he was going to write her note saying one of the kids was handicapped and couldn't wait in lines without having a melt down. At first the neice was going to refuse because none of the kids are handicapped, but the doctor convinced her to do it and said he's done it before. He then laughed and said it was inhumane to try to have six kids in line in WDW during the July heat. Since then every year, the neice gets a GAC for one kid saying things like they can't be out in the heat, need to take the stroller in, can't wait in lines, etc. I was shocked and told my coworker that a GAC says right on it that it's not for front of the line access. When they got back from their trip, my coworker told me I was wrong and that they got to skip most lines with the GAC.
She said there was absolutely nothing wrong with her great neices and nephews, but her neice had no problem getting a GAC for one of them each trip and did so, just so they didn't have to wait in long lines and their wait was always shorter.
2. My mom and I were staying at AKL last Sept. One day we had parked in the handicapped area right in front of the lodge and I was getting my mom's ECV out of the trunk. A couple pulled up beside of us. As they got out, the man told his wife, "Make sure we don't forget to get my dad's handicap plaquard out of this rental car. If I forget to bring it back to him he'll kill me". The wife assured him she wouldn't forget and made the comment that she was sure glad they brought it, because it kept them from having to walk so far and they should have been bringing it every year. The man said, Yeah and they'd be bringing it from now on.
3. Same trip, last Sept, I had just popped the trunk and was getting my mom's ECV out of the trunk early one morning in the Epcot parking lot. We were parked on that very first row close to the gate. A group of young boys around 18-20 y/o parked beside of us in a crew cab pickup. They immediately offered to help me get the ECV out of the trunk and even when I said I was fine, insisted on getting the parts out of the trunk for me. I thought wow, there are still some nice, well mannered teens out there. But then, as they started to walk off, I heard one of them tell another how smart he was to borrow his grandparents handicap tag and how he couldn't believe how close they were able to park with it. The other teen, said yeah, he used his grandparents handicap plaquard more than they did, because the grandparents couldn't drive much anymore and it saved him and his parents from having to walk in parking lots.
He also made the comment that if they rented an ECV or wheelchair in the parks that they could use it to skip lines. Another of the boys, said, "nah, that's too much trouble and would probably cost too much". The first boy said yeah, but if they shared the cost, it wouldn't be too bad and it'd let them skip all the lines. Since my mom uses an ECV I know that's not true, but was sortof hoping they'd do it, just so they could learn that for themselves. Using the grandparent's handicap tag, did let them use the handicap parking space though.
Anyway, I wasn't particularly looking for abusers, but these three just sort of fell in my lap, so to speak (two on the same trip yet). You know there has to be alot more though.