Use subject lines carefully. Don't waste people's time by giving a vague or inaccurate header to your post. Cite appropriate references. Images in Usenet are usually encoded with WEncode or BinHex. If you see only gobbledygook, you'll need a shareware utility that decodes them for you.
Unmoderated groups are self policing.
In moderated groups,.to post or respond to threads you must send mail to the moderator, who screens each message, then forwards it to the newsgroup if appropriate. Usenet is arguably the biggest online community, with ongoing discussions on everything from aliens to zoology, but it was designed by geeks for geeks. But spammers and clueless newbies have rendered many once-valuable newsgroups totally useless. It's hard to understand, hard to use, and hard to find relevant discussions. Talkway is just that - a new graphical interface to Usenet that makes everything easier.