The there's a certain fear of ISPs implementing work-arounds articulated in the article. I'm not surprised - the IP addresses in question can't ever be reliably reused if some ISPs set up special routes for them. And they will do exactly that if they suddenly get a flood of complaints about "the internet not working".
That's a clearer explanation than I was able to parse from the article - thanks!
It seems to me that the right thing to do is to implement the blanket redirect centrally. If ISPs want to implement something different for their traffic, they are free to do so.
The IPs are probably now no good to anyone anyway - they will be in too many blacklists.
I'm not trying to put words in Paul Vixie's mouth by the way, so "explanation" is too strong a word. It's just my interpretation. I'd agree that the article could go into more detail on why this is a bad thing long term; I'm sure there's more to it.
