I don't mind it that much, but it can get a bit tiresome. It's not that hard to search to see if it's been posted already. If a topic is interesting enough it usually sticks around for a few days anyway. By that time most people have put their 2 cents in already. If not, can't they just bring back up the old topic? Anyway, no biggie really. It's more tiresome when someone posts something that's already there 3 topics below the new post.
"The gods who nurse this universe think little of mortals' cares. They sit in crowds on exclusive clouds and laugh at our love affairs. I might have had a real romance if they'd given me a chance. I loved him, but he didn't love me. I wanted him, but he didn't want me. Then the gods had a spree and indulged in another whim. Now he loves me, but I don't love him." - Cole Porter