Or it could be a need to prove onself -- see what I can do, now fear my wrath.
Or it could simply be hatred of humanity, you embarrass people enough and they may lass out on you -- in this case by putting your password online, in other cases by bringing a gun to school.
Summing up, it strongly depends on who did it.
This is perfectly normal.
I am hosting this at: http://drostie.org/yahoo_leak.txt . If I receive too much traffic I may simply pastebin it.
I made this for that very reason.
If this was a leak in yahoo, the number of users with a yahoo e-mail would be much, much higher.
http://blog.sucuri.net/2012/07/analysis-of-yahoo-voice-passw...
Interesting is the lack of "yahoo" as part of the passwords... I would expect a much higher % from a yahoo leak.
It makes you stop and think about whether they take security and their customers seriously.
