Consider to use a Follow-Up header to confine discussion to the most appropriate group. Thus, try to avoid large quotes. Quote only what you respond to. Mark deletions with three dots or a short summary of what you deleted, if you think the context is important. Most terminals and windows are 80 characters wide, and quoting will often indent your text a couple of times.
Lines wrapping around on the screen are very hard to read.
Try to be specific and to give enough information to allow the reader to anticipate your problems. They are explicitly forbidden by the charter, and belong only in the hierarchies explicitly intended for them. For more information on the appropriate behaviour on and the structure of Usenet check out the introductory postings in news.announce.newusers. This might pay off even if you think you are an experienced user or if you read them a couple of years ago. You might also want to check out the excellent alt.atheism FAQ on logical arguments.