Just turned 55 last year...
...so I'm now officially an "old guy", and I've been involved with the Internet as a user and Web designer for nearly twenty years, and while this method doesn't sound especially difficult, the requirement of a mobile phone number would definitely put me off. Do the voters get any information on who's going to get their mobile numbers, and how long they'll be kept, and whether or not it'll eventually be sold to some marketing outfit so the Oscar voters can be pestered to death with sales calls and SMS spam?
You can't totally blame the voters for being "too old". I'm sure a bunch of them took a look and decided "what? They want my mobile phone number? Fuck this!" The two-password verification would've been no big deal, but on arriving at the request for my mobile phone number, I would've definitely decided that it's not worth it just to vote on which wretched-assed movie will get a goddamn' little statue.
Speaking of which... I'm just a bit curious as to how many voters finally got into the system, decided "d'ahh, hell, all these goddamn' movies suck", and just bailed.
(Paris, because, let's face it... she probably can't figure out how to logon to vote for the Oscars either.)