They don't really care who you are. They do care that one multi day pass stays with one person. Making sure the same thumbprint is used every time the pass is used accomplishes that; somehow registering ID might, too (but then they need to either print it on the pass, or have a database of pass serial # to ID, in parallel with their fingerprint database).
An interesting option might be to do ID one day, thumbprint the next. But I guess they're smart enough to require the choice on the first use, and then not allow it to be changed.
I haven't tried this, but I was told a few years back by someone involved in the design of the passes that you can use the multi-day pass of a different person in your party. Disney recognized that in a large family people might mix up the passes, so all the passes issued as part of a transaction are interchangeable.
> They scan everyone, from newborns to grandparents.
I was there last month. My young children in strollers were NOT scanned.
> We had a 1-day pass, and got scanned.
The parks are open until 9 or 10pm. If you leave at 5pm, Disney doesn't want you selling your ticket in the parking lot on your way out.
I used to see this at ski mountains. People with wire cutters would ask to 'clip' your lift ticket in the parking lot for a few bucks if you were leaving the mountain early.
They don't really care who you are. They do care that one multi day pass stays with one person. Making sure the same thumbprint is used every time the pass is used accomplishes that; somehow registering ID might, too (but then they need to either print it on the pass, or have a database of pass serial # to ID, in parallel with their fingerprint database).
An interesting option might be to do ID one day, thumbprint the next. But I guess they're smart enough to require the choice on the first use, and then not allow it to be changed.