Who knows it ? If anyone hasn't heard about CDSs or CDOs even if it isn't by name they'd have to have been living under a rock (or with the pprune wannabee zombie army).
Most people live under rocks then. Think how thick the average UK citizen actually it. Then consider that half the population is thicker than that.
Mentally these people are children. Letting them run loose with leveraged finance and credit cards was malicious, unprecedented and deliberate.
WWW