ECN support in kernel 2.4.x — curse or boon?

From DebianPlanet: “ECN is one of the more controversial features in the 2.4.x kernel series. Basically, it reduces congestion. In theory. However, there are quite a few broken routers out there that will just drop ECN packets. So, how is this related to Debian? It’s included in the default woody kernel-image. Read on for a more detailed explanation.”