Sure, .eco is a catchy domain-space.  How about .gun?  Or .nra?

If we are going to open up domain-terms for groups that can show a constituency, there could obviously be two sides to the process.

There is also the consideration of 'cross-staking'.  Smart climate-skeptics have a shown a talent for picking 'eco-appealing' names.  Nothing to stop 'bad guys' from homesteading nice .eco names.

But my biggest concern is that we already have a 'domain-proliferation' problem.  If one wants or needs to 'secure' or 'protect' a domain-name, it is necessary to buy up a growing flock of domain-types, most of which we may have no interest in (to prevent others from diluting or even exploiting our base-name).

Exxon will be chagrined, if they don't snag http://www.exxon.eco in time.  Gristmill will be horrified if someone succeeds with http://www.gristmill.gun.

Generally, I am neither wild about the proliferation-scene, nor impressed with the dubious efficacy of specialized domain-roots.