The problem is recognized but can't be solved entirely. We make some efforts to stem the flood of duplicative threads, including thread moderation and public and private reminders to members, but the members who join and immediately post the latest "overly popular" question without searching are often the same members who ignore the FAQ and sticky threads. We try to find the right balance between getting the word out and not annoying already-well-informed members with yet another plea. We also try to keep the number of sticky threads to a minimum so more active threads will show on portable displays.