Oh here we go..attack of the Linux nerds!
OMG OMG the default bitcoin cleint's security sucks..OMG unencrypted wallet.dat is such a good idea!
Anyways, this is the standard response most of you give...so yeah..moving on.
Keep proving the world that you are a bitter troll with no clue about computer security. A wallet.dat encryption is a false security feature, go troll somewhere else.
Ha! There are ways to mitigate the risks and make it a lot harder for a hacker to get at your BTC. The worst thing is to just leave it in plain sight sort of speak where any simple coder can just ftp or e-mail the wallet.dat file.