If I'm remembering this right, the stereotypes about the next 1,000 IDs all being idiots started around 3,000.
1,000: HOLY stuff YOU GUYS, 1,000 BLOCKLAND PLAYERS!
2,000: Oh, cool, 2,000. woo.
3,000 - 9,000: Holy stuff, now we will have tons of idiots flooding in here.
10,000: HOLY stuff YOU GUYS, 10,000 BLOCKLAND PLAYERS!
11,000 - 17,000: Stop spamming up General Discussion with these topics about another 1,000 IDs.