In the 80s, it was their steadfast opposition to creation of a codeless amateur
license class.

In the 90s, it was Low Earth Orbiting Satellites (LEOs.)

Today, it is Broadband via Power Lines (BPL.)

In earlier times, hams were known for being on the cutting edge of technology.
But in recent years, hams are known for repeatedly trying to stand in the way
of new technology.

Sad irony, isn't it?