Fingerprints can be faked. While I'm not sure that's happening at themeparks, I'm pretty sure that it wouldn't be out of the realm of possibility for check fraud gangs who likely also change their appearance before going into a bank. I suppose the banks prevent a bit of the low-level fraud from Meth-heads who steal checks out of rural mail boxes and wash them. But that doesn't discount that you have now been permanently fingerprinted. It's recorded, your ID and other information will be taken down with it (and your financial transaction will make it's way to foggy bottom I'm sure). Valid ID's have been used for years, so the serious security flaw is in how the banking system handles checks in the first place. I don't think this breach of privacy is the right solution - it was just the most expedient and cheap one for them.
And that record never goes away. Nor have you signed any document or contract with said bank stating that any loss of that information has consequences or provision to any 3rd Party is in your control... no no, that's THEIR information now. And in a world where monthly I hear of massive data loss with social security/name/account numbers, this doesn't sit well with me. If Citibank can lose their stuff or have it "go missing", do you think the local bank will do much better?
Disney might have other things in mind... I'm thinking child molesters and kidnappers are targeted in addition to amassing a vast set of data on their consumers. Again, what happens to that fingerprint is undeniably out of your control - and it appears that they were more than willing to say it was for one reason and then not follow through... this is the company that says you should trust them to take a permanent digital imprint of your biometric data.
And my buddy loves to say "but if you aren't doing anything wrong...." Well, I wasn't doing anything wrong, and I didn't plan to, but I'm not going to blindly give up my life's history to a corporation which can use it for anything it sees fit. I'm sure that even if you did sign something saying they would keep it private, that the moment they broke that agreement or some federal agency went data mining, congress would roll over and make it legal. <img src="/images/graemlins/confused.gif" alt="" />
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Experience is a hard teacher because she gives the test first, the lesson afterwards.