As I said, they did it for the lulz.
This is 4chan we're talking about. They'll do anything for the lulz. They did, amazingly, manage to do something productive and proactive in protesting Scientology, but for the most part, they're just a bunch of bored obnoxious jerks spamming memes on the Internet.
The thought process probably went something like:
Look! Governor pain has a yahoo! email address. What a moron.
Pics pls.
Dude, you can't have pics of a yahoo email account.
You can if you hack it!
None of Palin, but here's some of Mizuho. *sexy picspam*
omg palin totaly looks like mizuho
*pic spam*
*pic spam*
*pic spam*
*pic spam*
*pic spam*
Okay I snooped around in there, but there's nothing good. It's your typical mom ********* Pics of her kids and stuff. However, there WAS something that I think is illegal . . .
*pics of yahoo! account, showing threads with government related titles*
That **** is boring man. Where's the bikinis?
Where's Bristol? :(
LEAVE BRISTOL ALOOOOOONE
lulz
Sup /B!/
Sup.
*pic spam*
*pic spam*
*pic spam*
I just totally sent those screenshots you took over to the press.
LOL!
*pic spam*
GG man!
You are awarded one Internets!
*pic spam*
Hahahah! God she's an idiot.
You don't have to tell God that, he already knows.
Where is your God now?
*pic spam*