When you post identical messages to different newsgroups independently, many people waste their time downloading and reading a message they have either already read, already answered, or didn't know was already answered by someone else, in another group.

Have some consideration for the people who are giving freely of their time and knowledge to help solve your problems - post to ONE *on-topic* group — if it is not an appropriate group, someone will guide you to a more useful group in which you will be more likely to get a speedy, accurate answer. If you really, really, really think that your question belongs in more than one group, than use the *cross-posting* feature of your newsreader. Do not post your message to one group, then post it again to another, then post it again to another...

Multi-posting often gives the impression that you are impatient, and that you think your question is more important than those of every other user who is following netiquette guidelines respectfully.

You were directed here by someone who already answered, or at least already read, your question in another group... and they're annoyed that they've had to read it again.

One response to this was as follows:

 
"Your advice not to multipost is inherently flawed.

With the unstable and unreliable nature of newsgroup and message propagation around the world, if someone critically needs an answer, then it is reasonable that they will post to several groups to ensure that a knowlegeable respondent has an opportunity to do so. It is up to those who would be offended by multiple posts to get over it and move on. Those who are "offended" by multiple posts probably have no idea about how newsgroup servers work in the first place. A more appropriate guide would be to encourage people to post their question to the appropriate group(s) in a clear and concise manner. Also, it would be worthy to encourage posters to ignore flames, spam, and trolls."