2008/12/9 Andrew Gray shimgray@gmail.com:
Bear in mind that for most sites which allow user upload... well, their system would work quite well. URL blacklisted, disappears from view; the rest of the site is unaffected. Even were someone to spam youtube with abusive videos, they could be filtered without any significant adverse effects once reported. Not many sites deal with IPs of their visitors quite the way we do...
1) Their system was dropping connections under a wikipedia loads. Hitting them with youtube as well would cause issues.
2)while most sites don't use IPs to the extent we do most of them like having them available as a factor to work with and taking that away would annoy them
3)Depending on who is operating the proxies in question privacy issues start kicking in.