* Nick Hilliard:
Geoff Huston's talk about this at RIPE was rather interesting. Yes, the routing table will grow. But that's only part of the problem; a bigger part of the problem is routing churn.
Take a look at pages 37 and 38 of:
http://www.ripe.net/ripe/meetings/ripe-52/presentations/ripe52-plenary-bgp-r...
Interesting. But -- obviously, it's not a significant problem. Otherwise, there would be peer pressure to fix it. Unlike things like BCP38, it's clear where the unnecessary BGP announcements/withdrawals come from.
You can see that there is a small number of organisations responsible for massive numbers of updates. I can tell you that If I were supreme ruler of the universe, these organisations would get a smack on the face.
The number of origin ASNs may be small, but their uplinks and peering partners support this behavior, at least passively.