Ha Ha Let em hate. It's good exposure and helps weed out the thundercunts that believe anything they hear on internet trash blogs and what not. You don't want them as fans anyways.
From what I've heard:
Jessica - Scouted shopping with her mom on the street in Korea. Here's that video @4:00: [noembed]http://www.youtube.com/watch?v=A0NBUtgKhgQ[/noembed]
Tiffany - Scouted singing at an audition in the US
Taeyeon - Friends convinced her to try out with them but they backed out she went by herself and ended up winning 2004 best singer competition.
Yoona - Auditioned 100s of times, picked at an SM Saturday open casting in 2002. (think I heard Heechul was scouted at the same one)
Yuri - Won best young dancer competition 2001
Sooyoung - ??? not sure but she debuted in Japan and lived w/ BoA and Sunday.
Seohyun - Randomly spotted by a SM employee playing with her brother in the subway.
Hyoyeon - ??? was a backup dancer for BoA?
Sunny - Was at the same agency her sister worked at or something. Replaced Stella (and a Sunny was gained!
)