This is actually rather reminiscent of when schools started getting computers and then laptops (minus the air-dropping, of course). A lot of times the equipment was simply dropped off at the schools with no more instruction than the user manuals. Teachers and administrators were left with figuring out how to integrate the technology in their "spare time." It wasn't pretty and this is worse.
Other folks have already pointed out the connection issue. In many countries cell service is fairly common, even out in remote areas, but someone still has to foot the bill for the wireless contract.
Likewise, these computers cost something too. If I were a stockholder (if there is such a thing) in OLPC, I'd be raising a fuss at the next meeting.
The total lack of concern for how these will be used borders on idiocy... from the wrong side of that border. How does it figure that a child should be able to figure the use out, but an adult couldn't. (It's that old myth of adults being computer-phobic, I'll bet.) Most of these devices _will_ be taken from a child lucky enough to find them first and, if the person who takes it can't figure out how to use it, he'll find someone who can or sell it to someone who can.
I think the only theory that makes sense is the one that these were going to have to be dumped anyway, so they came up with this futile, PR stunt instead.