> Conclusion: There is no common standard because every
> major ISP can set their own standards. This will
> eventually force everyone to use the same services
> worldwide.
>
> Where's the freedom of choice [of ESP] here?
My point being that the current blacklist-based system is broken from a "freedom of choice" perspective. The current system favors the established ESPs, as the cost of doing it yourself gets larger and larger.