This article is from the sci.fractals FAQ, by Michael C. Taylor and Jean-Pierre Louvet with numerous contributions by others.
There are a couple of common mistakes people make, posting ads,
posting large binaries (images or programs), and posting off-topic.
"Do Not Post Images to sci.fractals." If you follow this rule people
will be your friend. There is a special place for you to post your
images, "alt.binaries.pictures.fractals". The other group
(alt.fractals.pictures) is considered obsolete and may not be carried
to as many people as "alt.binaries.pictures.fractals." In fact there
is/was a CancelBot which will delete any binary posts it finds in
sci.fractals (and most other non-binaries newsgroup) so nearly no one
will see it.
"Post only about fractals", this includes fractal mathematics,
software to generate fractals, where to get fractal posters and
T-shirts, and fractals as art. Do not bother posting about news events
not directly related to fractals, or about which OS / hardware /
language is better. These lead to flame wars.
"Do not post advertisements." I should not have to mention this, but
people get excited. If you have some "fractal" software (or posters)
available as shareware or shrink-wrap commercial, post your "brief"
announcement "once". After than, you should limit yourself to notices
of upgrades and responding "via e-mail" to people looking for fractal
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