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A comment on Tumblr just dropped out of DNS. Parent comment

Re:Tumblr just dropped out of DNS by tmx on Wednesday December 12, 2012 @06:22PM (#4913076)
That'll teach me to post late at night. I forgot wildcards existed.

I was thinking that (if I built tumblr) they would do subdomain searching at the DNS level to avoid hitting their database.

Makes it even worse if they are using wildcards.

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Re:Tumblr just dropped out of DNS by X-Istence on Wednesday December 12, 2012 @09:04PM (#4913750)
But if you don't publish an A record you get an ugly browser error message, whereas publishing the wildcard gives the user a notice saying that no such blog exists.
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