Aside from the battery, I think it's a security issue. Right after I got this phone, I had to do jury duty in LA and the jury room had free wifi available. Of course it was unencrypted. While I was waiting, I was handling some pretty sensitive corporate emails, and got this message that there was an unsuccessful unauthorized log in attempt. That freaked me out. I remembered that the connection was unencrypted and quickly turned off wifi. And on throughout the day, the wifi would magically turn itself on without me toggling it. At the time, I couldn't figure it out. I eventually figured out later that it had this new functionality. An environment like that would be the perfect setting for a thief to setup in the corner and sniff the unencrypted data being transmitted. You would think that they would imbed some sort of feature where it wouldn't automatically connect unless it was encrypted or at least prompting me first.
From what I've seen out there, most casual smartphones users aren't all that sophisticated. Most don't know about security issues related to networks and data. They probably couldn't even navigate through advanced settings if their lives depended on it.