annep1
I think "butt in" is a rude way to describe someone trying to add a helpful comment.
If it's already been said then no harm is done. But if someone feels they have something to add which could be useful then they should whether or not they have read all the other comments. Some of us are too limited in energy to read the often large number of comments on threads.
I'm not sure how to edit a quote, but I wanted to comment on one point above - 'if it's already been said then no harm is done.'
My point was that it can be harmful if posters feel that they are being ignored. We often see people saying that they have commented on threads but nobody takes notice of them, and that someone else making the same point gets replies.
I'm not saying it is a life-changing thing, but if it stops people from joining in on threads then harm is done, as it is if people are hurt by it, which some clearly are.