I finally found the time today to try out my copy of BT4 Beta. :] So far looks good, however I downloaded my copy more than a month ago, so I don't really know if it's up to date. I'm downloading the VM version right now.
As for you point about motives for cracking WIFI, I think your absolutely right. Most people are either board, want to steal information, or just want free internet. And your also right, Most people planning to abuse the victim's connection, they probably would go for an easy kill... or as you said, an already dead connection.
And, if your government's after you, then you may as well count yourself caught...
WPA is about the most secure the average computer user needs to be.
With the right amount of time you can bruteforce anything. Its only a matter of whether the time is relativly possible or not.
Bruteforce WILL eventually find the right password. No question asked.
Dictionary is NOT bruteforcing since it isnt guaranteed to EVER find the password if its not in the dictionary.
For those interested in the figures, read this thread:
Specifically, at the top of page 3 within that that thread, I run some of the numbers:
Passwords are like underwear. They should never be shared, and changed often.
That was one of the best written up threads I have read on this forum, even the grammar and spelling was immaculate-delicious, thanks Thorn.