Anonymity?

Someone just sent me this message:

I just learned something interesting that you probably don't know, Kent.
You cannot post to your blog using an anonymous proxy.
More piggery from the government!
Perhaps you should inform your readers that posting "anonymous" will still show their IP address to the pigs.

I always assumed there was no such thing as real anonymity on the internet anyway, but you might want to be aware of this tidbit of information.

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