Here's a list of all the people the staff on Friendcodes.com recognize as known seeders. Most of the people on this list have been banned, but it is recommended that if you see any of them on this site, you report them to a moderator immeadiately.
KEEP THESE PEOPLE OUT OF YOUR TOWN AT ALL COSTS!
alexjmorris [BANNED] Clan: The Crooks
Friendcode: 283595009803
Name: Alex
Town: weston (unconfirmed)
Other Notes: Entered a room, seeded someone and announced his allegiance to The Crooks. Keep out of his way.
ThomasWii/ThomasWiii/thomasnds [BANNED] Clan: The Crooks
Friendcode:227757444423
Name: Thomas
Town: unknown
Other Notes: Has attempted to return to
FC twice after his ban, make sure you keep this friendcode handy and avoid this user

.
AJo14 Clan: The Crooks
Friendcode: 1074 8984 9999
(unconfirmed) Name: Lay-Z
(unconfirmed) Town:
unknown Added: November 10, 2007
Other Notes: Last seen recruiting members for the Crooks clan.
WiiSonic [BANNED] Clan: The Crooks(?)
Friendcode: 0215 9007 0689
(unconfirmed) Name: Evan
(unconfirmed) Town: Doomvill
(unconfirmed) Added: November 10, 2007
Other Notes: Was last seen being recruited as a member for the Crooks clan. He may or may not be a seeder, but was considering joining the clan. UPDATE: He claims he betrayed the Crooks, but there is no proof of that. Keep an eye out for him. FINAL UPDATE: We have proof that he seeded someone else. He's been permabanned.
kempokid [BANNED] Clan: Spectrum Pirates
Friendcode: 1289 6233 7621
Name:
unknown Town:
unknown Added: November 10, 2007
Other Notes: Entered a room and announced he was a Spectrum Pirates member then seeded someone. He shouldn't be too hard to avoid.
MegaMushroom07 [BANNED] Clan: Spectrum Pirates
Friendcode: 0945 8901 4178
Name:
unknown Town:
unknown Added: November 10, 2007
Other Notes: This member is the LEADER of the Spectrum Pirates clan. Avoid him if possible. He's tried ban evading in the past, and the moderators are always looking out for him. If he comes back, tell a mod IMMEDIATELY.
mythical [BANNED] Clan:
unknown Friendcode: 2620 6286 4093
Name:
unknown Town:
unknown Added: November 18, 2007
Other Notes: Assosiated with ArwingAce, another seeder.
ArwingAce [BANNED] Clan:
unknown Friendcode: 0988 9990 6127
Town:
unknown / Detour
Added: November 18, 2007
Other Notes: Has seeded multiple people.
(Note: Due to multiple reasons, I am unable to maintain this list. It simply takes too much time to list seeders, because new ones come up daily, and it's impossible to list them all. In the future, this list will only be updated to list high-profile seeders, such as the ones listed above)