I might remind everyone that there are reputable tour groups such as
David Levy's & of course Sky & Telescope & Astronomy Mags.

Being in the Travel business for just a few years and another member of
my family being in it since the 1960's you quickly learn that you
shouldn't pick fights with anyone because you never know who might be
looking to go on a tour and they can decide not to go with your group.

The customer may not be alwasy right but he is your bread & butter and
if you can't provide him or her with enough information etc. they can
and will find another company to do business with. Your loss and their
gain.