I'd just like to point out two things for everyone who is afraid of the technology or dislike the wristbands.
If Disney doesn't do wristbands, it can also do it on simple cards. Those FLIK cards they hand out in the queues to keep track of how long you wait in line use the same exact technology. To be quite honest, many people already have this technology in their wallets even if they didn't choose to have the option. If you have a Debit or Credit Card, take a look on the back of it. If you see 4 curves lines that look a representation of sound or radar single or something, then you have the ability to just wave your card over those fast pay devices at gas stations and fast food restaurants. Many people don't realize that they have this ability or that they "signed up" for it, but already you have card that holds this technology and you are carrying it around with you everywhere! So if they don't give you a wristband, they could possibly also give you a ticket/key card with the same abilities, its just that a wristband would probably not get lost quite so easily. To make you more paranoid, Disney could very well add this technology to your keycards and tickets and you may never even know unless you read some fine print somewhere. Maybe they are already tracking you!
Also, Disney has used this technology on ALL cast member costumes now and it's great. It's faster. From what I understand the RFID readers can be turned up and down to adjust to how far away they can read. Things like hotel room doors will want to be extremely close, while interactive park elements may allow for guests to be a few feet away.