How do they do this???

[Imparcticle]

How are some guests able to post and start threads on pfs without being members?

Take this thread for example:

http://www.physicsforums.com/showthread.php?p=303927#post303927

None of them are members but can still post.

[hitssquad]

How are some guests able to post and start threads on pfs without being members?
Take this thread for example:
http://www.physicsforums.com/showthread.php?p=303927#post303927They are not posting on Physics Forums. They are posting on the newsgroup sci.physics.strings (http://groups.google.com/groups?q=sci.physics.strings), and Physics Forums is mirroring the posts. (Newsgroups are (http://www.google.com/search?q=%22newsgroups+are%22+usenet) part of Usenet; you may note the link at the top of each mirrored newsgroup post that says, "View this Usenet post in original ASCII form."