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(Edit: I would be very interested in an attempt to justify that based on free speech principles though.)
No, just because the data is public does not justify aggregating it and presenting it to the public. Pretty much everyone's address is public information.
(or at least, it should be a crime. Its exact legislative status is murky and much weaker than it should be in the US, but it is almost universally banned by online services, for good reason.)