Because Bronies might not know other users who are also Bronies.

There's a MLP: FiM club!

YO I DON'T FUCKIN' UPDATE THIS ANYMORE, DON'T COMMENT OR MESSAGE ME ABOUT THIS.

Comments/PMs/IMs containing the usernames of NG Bronies will have those users added to the list. If you wish to remain anonymous (only via PM/IM/Steam), you must state this, otherwise you will be credited. Note: you don't have to be a Brony to contribute.

Bronies (listed from oldest to newest additions):
Drake
Ragnarokia
Ryan
Drony
Manly-Chicken
MercatorMapV2
ComradeMolotov (confirmed by BumFodder)
betteratbrawl7777 (thanks to betteratbrawl7777)
Rockyusa (thanks to Rockyusa)
BumFodder (thanks to BumFodder)
FurryNG (thanks to daethdrain)
kisame (thanks to kisame)
Lintire (thanks to kisame)
Valjylmyr (confirmed by Valjylmyr)
Xenomit
XenonMonkey
bgraybr
hongkongexpress
TailsPrower
J-Cobyz (thanks to J-Cobyz)
RubberTrucky (thanks to daethdrain)
daethdrain (thanks to daethdrain)
shrimpchris (thanks to shrimpchris)
Asandir (thanks to BumFodder)
Gerbil (thanks to Gerbil)
Corpus-Delicti
HeavyMetalGuy
Mechabloby (thanks to Mechabloby)
HailSaban (thanks to HailSaban)
Kunera (thanks to Kunera)
Finalfina (thanks to Finalfina)
Oliver (thanks to Gerbil)
Bogoblin (thanks to Bogoblin)
tox (thanks to daethdrain)
malachi117 (thanks to Kunera)
coleknows (thanks to HeavyMetalGuy)
Viri (thanks to HeavyMetalGuy)
halosss (thanks to halosss)
mrpwnzer (thanks to BumFodder)
FlyingNinjaBannanas (thanks to FurryNG)
Bees
Quinny (thanks to shrimpchris)
Sleufoot2010 (thanks to FlyingNinjaBannanas)
The-Great-One (thanks to The-Great-One)
PePpEr828 (thanks to PePpEr828)
yos2 (thanks to BumFodder)
Norix (thanks to shrimpchris)
JohnEndel959 (thanks to shrimpchris)
Bryan (thanks to tox)
ImaSmartass2 (thanks to tox)
MindChamber (shocking! Thanks to Makeshift)
Chocomilk (thanks to Chocomilk)
distoorted (thanks to HeavyMetalGuy
36Holla (thanks to Ryan)
Timmy (thanks to Ryan)
Shauna (thanks to Ryan)
Confucianism (thanks to Confucianism)
Klik (thanks to Klik)
Lunaful (thanks to Lunaful)
Eddmario (thanks to Eddmario)
MrPercie (thanks to MrPercie)
Pinkie-Pie (thanks to Pinkie-Pie)
STEM (confirmed by Bryan)
manicjudgement (thanks toJ-Cobyz)
jabmoreno (thanks to J-Cobyz)
Morph94 (thanks to J-Cobyz)
QuietStealth (unconfirmed)
Unknown-12 (thanks to Unknown-12)
jake-thesnake (thanks to jake-thesnake)
EpiMedic7 (thanks to J-Cobyz)
magnumheadshot702 (thanks to J-Cobyz)
skaterdude411 (thanks to skaterdude411)
Pjorg (thanks to Pjorg)
Iccc (thanks to Iccc)
Outlaw88 (thanks to Outlaw88)
Racoonmario
megakill (thanks to HeavyMetalGuy)
killerrob (thanks to killerrob)
urimas (thanks to J-Cobyz)
Sisenik (thanks to J-Cobyz)
Sevkat (added for the lulz)
razorbladesigh (thanks to razorbladesigh)
NyanLock (thanks to J-Cobyz)
Mrmongooseman (thanks to Mrmongooseman)
Psych (thanks to shrimpchris)
All-American-Badass (thanks to shrimpchris)
HotDiggedyDemon (thanks to Pjorg)
resd (thanks to shrimpchris)
krilly (thanks to shrimpchris)
Chdonga (thanks to shrimpchris)
MintPaw (thanks to shrimpchris)
Bashsc (thanks to FurryNG)
Ugilitiozavrus (thanks to FurryNG)
Pocketpod (thanks to FurryNG)
zcxvcbvnbmn (thanks to FurryNG)
DarkHalcyon (thanks to FurryNG)
abcruler (thanks to FurryNG)
DualGunner (thanks to FurryNG)
forgivensake (unconfirmed; thanks to FurryNG)
glrr (thanks to FurryNG)
Goombella (thanks to FurryNG)
Nekit1234007 (thanks to FurryNG)
termitater88 (thanks to FurryNG)
ZIGZAG4EVER (thanks to FurryNG)
Egoraptor (unconfirmed; thanks to FurryNG)
kakalxlax (thanks to Xenomit)
Yhtomit
Dark-critical (thanks to Dark-critical)
MarinesSpecOps (thanks to shrimpchris)
Rozenbuddy (thanks to shrimpchris)
Bannanaphone (thanks to shrimpchris)
EddsWorld (unconfirmed; thanks to FurryNG)
Grub-Xer0 (thanks to Ryan)
Phobotech (thanks to shrimpchris)
KFMN (thanks to shrimpchris)
JakBaronKing (thanks to shrimpchris)
DragonOverlord2012 (thanks to DragonOverlord2012)
Rainboom (thanks to Rainboom)
111122223138 (thanks to Corpus-Delicti)
Ericho (thanks to The-Great-One)
Athir (thanks to Athir)
Suprememessage (thanks to Suprememessage)
Rhinocerider (thanks to Rhinocerider)
Salnax (thanks to Salnax)
Michaely385 (thanks to Michaely385)
narutoblackman (thanks to Bryan & narutoblackman)
PinkRose11 (thanks to PinkRose11)
Greenfrost6 (thanks to Greenfrost6)
Xyphon202 (thanks to Xyphon202)
DubCore (thanks to Xenomit)
RYNOL (thanks to Finalfina)
dark-fox
Luis (thanks to The-Great-One)
Dunkane (thanks to shrimpchris)
Urijah (thanks to shrimpchris)
sweetcommando (thanks to shrimpchris)
xXxwarren6543xXx (thanks to shrimpchris)
FlockMastaBack (thanks to Finalfina)
mizzjuicyflava (thanks to Finalfina)
TwittSoup (thanks to TwittSoup)
Tribal (thanks to Tribal)
Gamewiz (thanks to Gamewiz)
Glowandstar (thanks to Glowandstar)
MattTheParanoidKat (thanks to MattTheParanoidKat)
Alex616 (thanks to Alex616)
ElectroKitty (thanks to ElectroKitty)
MikeyS9607 (thanks to MikeyS9607)
Alfa995 (thanks to DragonOverlord2012)
Dan12905 (thanks to Dan12905)
Solrac (thanks to Solrac)
Kiari847 (thanks to Kiary847)
powerdude964 (thanks to powerdude964)
TruBluFoxx (thanks to TruBluFoxx)
Rina-chan

Celestiaspeed, Bronies.