You may have put why you dislike the finger scan but just because you refer to another post does not mean you have answered my point. But thats OK you don't have to it's just a discussion. None of the points raised has anything to do with the information of the finger scan. Keeping names and address, credit card and movement information safe is understandable but all that is alligned to the tickets you will swipe going into the park not with your fingerscan.
Then let me answer your question directly once again:
Since they started this biometric mumbo-jumbo, I have knuckled under for the sake of convenience. But I don't like it, and here's why:
The finger scan, whether it is a "picture" of my fingerprint, or an algorithm, or whatever, is demonstrably one thing - a unique set of numbers about my fingerprint that the WDW computer can - and does - use to specifically identify ME among the millions of other Guests who also have WDW tickets. It's done to prevent me from using someone elses ticket, and to prevent anyone else from using mine.
Okay, so whatever KIND of ID the biometric saves, it's definitely an ID unique to me.
Now, when I stay on-site and have my ticket coded onto my KTTW card, that unique identifier is linked to my name in the WDW computer system. And linked to my name is a file containing all the info WDW has about me fromall the on-site stays I have ever had - this info includes my name, address, home phone number, credit card numbers for any cards I have used to pay for my ressies, the dates of my all my ressies, any charges I make on my KTTW cards, the dates and times of any ADRs I have ever made under my name, and even the dates and times I entered every WDW park on any tickets I ever had coded on my KTTW cards.
That is sensitive info. Do I think Disney is going to do something neffarious with it? Of course not. But in the post-9/11 climate of fear and paranoia in the US, the US government can and does demand all sorts of sensitive info from private companies (sometimes with and sometimes without supoenas or warrants). Google search terms and Verizon phone records have been highly publicized as being demanded, as well as customer records and surfing habits from many national ISPs. Is it a stretch to think that Homeland Security might "request" Disney to turn over the customer database at some point to track a suspected terrorist?
And once the government has this info, they will lose it. The VA has lost laptops, and last week the TSA lost a laptop, with tens of thousands of private citizens' personal info on them.
"But you're already at risk," someone will argue. "Credit card companies and online vendors have all sorts of info about you, and they get hacked by identity theives all the time." That's certainly true, but the fact that you are constantly in danger of being in a car crash does not mean that you should simply give up on the concept of staying on the right side of the road.
There is always risk in life. Trying to eliminate risk is a fool's errand, but it is only prudent to take reasonable precautions, and to avoid the worst and riskiest behavior. Simple things like not mentioning your home address or phone number on the DIS boards, not accepting rides from strangers, not allowing your 6-year old to walk to school alone, and not automatically giving out any and all personal information that any company demands it, are reasonable precautions.
The whole fingerscan at WDW is not as big a risk as broadcasting your home address over the internet, but it's one of those things that seems unnecessary and somewhat excessive for its purpose. And it's just one of many such minor instances of private companies or government agencies assembling databases of personal, private information.
Sure, they all say they're going to keep that info safe and never use it for anything bad, but considering the number of companies and government agencies who have had vital customer info lost, stolen, or hacked in the last few years, well... let's just say that some natural skepticism as to the purity of all human motives has come and sat upon my chest.