Since most of us are not able to watch the thread constantly I prefer an article to reappear some hours later.
If I have already seen and/or participated I simply move on by.
I couldn't agree more. duplicate posts within 30 minutes of each other are a nuisance at times, but a duplicate post several hours later should not be considered a problem except by those who have nothing else to do but spend all of their waking hours on FR.
It's like all those TV channels I don't watch. If I've seen the show or am not interested, I watch something else.