@gollum,
As with any berries - you should not wash them until right before eating - I think that might be why it says so on the instructions I typically see on the berry package.
Just a guess on my side - but you know how those grocery stores have that stuff sprinkling water on them - probably not ideal for berries.
I would wash even if organic.
Yeah any berries can get mold - why I shake the package gently and pay particular attention to those on the bottom where the moisture tends to get trapped.