Any information provided is readily available in public resources (like the
WHOIS database, or phonebook), readily observable, and/or useless for anything
that would cause me any problems.
When this information is known to be readily available, less effort is wasted
trying to treat it as secret. Further, data that might be gleaned from who has
access to, or makes use of this information, becomes less reliable and
valuable.
Of course, this all assumes that the information provided is actually correct.
"dubious, [a]: 1. Objectively doubtful; fraught with doubt or uncertainty;
uncertain, undetermined; indistinct, ambiguous, vague. b. Of uncertain issue
or result." -- Oxford English Dictionary (Second Edition)