Effective Site Exclusion Techniques

There's an interesting thread at Search Engine Watch forums called How To Dramatically Improve Site Exclusion. It's especially timely now that Yahoo has added this feature. Some of the ideas presented are:

* Make the site exclusion and targeting part of the campaign set up interface using reports. Have check boxes right in the campaign where sites can be excluded.
* Allow us to apply site exclusion(s) to all campaigns at once.
*Report on content traffic by segment (e.g. parked pages, error pages, etc.) and allow exclusion by segment.
* Allow exclusion in the Search Network.

I'd add: go back to giving us domain info on the error pages and domain pages, instead of lumping them in together. This way we wouldn't have to throw the baby out with the bathwater, since chances are it's one bad site ruining the whole bunch.

What else do you suggest?