full-disclosure - Re: Reverse dns (whether you want it or not)

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From: thegesus at gmail.com (TheGesus)
Subject: Re: Reverse dns (whether you want it or not)

On this subject (marginally), last year we moved a rather large CIDR
block from one ISP to another.

The new ISP took it upon themselves to give *ALL* our unused IP
addresses a bogus reverse lookup in the (general) format of

10.20.30.40.abc.domain.com

No one asked them to do this (or, at least if they did, they won't
admit to it), and none of the reverse lookups can be looked up
"forwardly".

Is this a common practice?  It doesn't seem like a good idea, but the
ISP insisted it was a "value-added" service.  In my opinion, a dead
address should remain dead.