I think some things about
DAS need to be set straight here. I have adopted children with disabilities, so hope I can help:
1) DAS is VERY hard to get, and extremely difficult to "cheat." Disney rebuilt all of their lines so that anyone with a wheelchair or EVC can go in the regular line. DAS is mostly for those with invisible disabilities (Autism, Fetal Alcohol Spectrum Disorder, Bladder control issues) who cannot wait in a regular line, either sitting or standing. If you check the DISabilities board, you'll see how many people are denied DAS on a regular basis. More are denied than accepted. It is an arduous process to get DAS in advance of your trip. It took me 10 hours of waiting online and going through multiple chats to get it for my children last trip. My children had to be present for video chats and interviews.
2)DAS is NOT the same as skipping the line with paid G+. With G+, you simply select the ride and can often ride almost right away. You can also stack attractions. With DAS, you get a return time that is equal in length to the current standby. Say the standby wait for Flight of Passage is 120 minutes. You get a return time that is 120 minutes after your selection. You cannot select any other rides to use DAS on until after you have checked into Flight of Passage 120 minutes later. The point of DAS is that you can wait to ride in a space that is not claustrophobic or hard to escape for the person with disabilities. For example, I can wait with my child with disabilities on a park bench, etc. until our time is called. If they freak out on the park bench or I need to rush them to the bathroom, I am able to move them (unlike a line that is locked in). Once our 2 hours of waiting for FoP is up, we will ride.
3)Many people with DAS choose to also buy G+ and use a combination of the two systems (due to the clunky nature of the process described above). I'll repeat it again - Many people with DAS also pay for G+
4)If I had to guess, I'd say that exponentially more people in the
lightning lane are there due to G+, not DAS
Hopefully this clears up some of the misconceptions about DAS abuse.