Well, I'll start us off, then. Double asterisks indicate accounts that caught my eye but I don't have anything other than a feeling about them belonging here.

Abcde00
Abop
alt-demasker
Bisonvega
**CaptnX4
cellsuper
ChameleonMKX
Che_Ape
comboplayer
cookly
DdOs.BooSSs_T
del_pierro
Derpnshire
Dreamer8411
eViL_UNioN
fez2
fkkekr
fkkk
jagoki
JaredLeto
Joshuaf98
kanyeTune
Khei_Khan
LiquidAgua2
Lord_Sith
**moonycat
MR_Sinistar
murray-the-man
nes-alt
nes400
newdude
Norris
pikaboom
**pumpkinbrea
Raziel360
rerepunisher
ryukenzo
segaxt
skjjzz
soxixixi
Trollzar
tuuuudu
WakaloX99
wosoaiiiwwiaiai
wowlvl
zumazen

A section for name-variant accounts (used for potential scamming, not the super obvious ones used for insults, with profanity in the name). Initially drawn from this post, but will update as needed.
asrul1192 (1192 instead of the authentic users 1992)
ddickins0n (note zero)
KingBradlley7 (note the double "L")
Socc0rro (note the zero)

And how do we feel about the following (several of whom I really think are not nes, but all seem a little scammy to me):
AlexZeusMercer
eMeKTiN
hustller
Krazynynja
Krotchkoman (thread)

EDIT: spelling and alphabetetizing failures. Will edit more as appropriate, if feedback indicates some need to be added or removed. Updated with the accounts from his rambling multimonologue. Updated 2 AUG. Keep letting me know if I've missed any, but do your due diligence.