Instead of "underground" I'd say "unprecedented".
Yeah, Intersango has had some rough time lately.
The concept of crypto-currencies has been well known and extensively discussed at academic-level. Bitcoin is the first implementation to actually gain traction in the real world.
Some banks have a hard time coming to terms with that, hence the knee-jerk reactions towards exchanges.
Until recently, the internet barely changed things for the banks and credit card institutions, merely allowing them to operate easier and faster.
They well deserve what's coming to them