Norman Cohen said:
I have never understood the extreme hostility to "cross posting"
...even though I now understand why there is SOME resistance to it..
The reason is that one group which is well behaved and fairly clean can
become littered by a lot of dirty or irrelevant messages from other
newsgroups through crossposting. And there is not much one can do about
it, except wait until the spammers in the crossposted groups change
threads and forget to include the cleaner group.
Anyway, what is the difference between "cross posting" and sending one
message to three groups?
Separate messages avoids the negative consequences of crossposting, but
means that somebody who reads more than one of the groups will see the
message more than once.
Different groups have different levels of acceptance towards
crossposting, so it is best to observe the habits in a group before
crossposting.
In some hierarchies of groups they get very irritated if you post
separate copies of the same message, because the participators subscribe
to several of the groups, in other groups they dislike crossposting a
lot, because it attracts a lot of irrelevant messages.