I think you're on to something Carolyn, with #6.
I have appreciated greatly the links and even some copied articles that are relevant to what I'm currently working with, on myself. Remember your attachment thread? Those articles hit at just the right time for me to work through that whole set of feelings, ideas and issues.
On the other hand, once I open a topic and see that something's been copied or linked to that's not of great interest (well - it might be - but time is short, right?) I tend to skip over it.
I guess it all depends on what the intention is, behind sharing something. What is the poster really wanting/needing?
6) It's not safe to post one's own thoughts on the board, so posting an article is an effort of dogged determination to continue to participate.
If #6 is really the case, I guess we can all examine our why's... and either continue to hide behind this kind of "sharing"... or resolve to try to change this habit - if it really is just a habit - and see that (as my taichi teacher says) "nothing bad will happen".
Myself, I don't feel that it's unsafe to post my own thoughts or feelings here, now - but I do understand that feeling well - because I was once there, myself. Live & let live... you know?