Duplicated and invalid

Hello,

I have noticed that there are various duplicated usernames (two uuid with the same username), as well as various invalid usernames (a uuid with invalid characters in the name like a space ,./?-) created through api vulnerabilities and exploits in the past. I think that these duplicated and invalid usernames can cause console errors on realms and on multiplayer servers. They are problematic and should be considered for correction before everybody migrates, so I have made a list of all the ones that I could find. At this time I am not including uuid, but if you need me to include uuid please let me know.

Invalid character usernames:
..Shadow..
.Flow
Cool.J
critical.error
internet.com
michael.selvaggio
mr.boo
Mr.Denis
Mr.LoL
Mr.Troubles
Parry.Ben

Long usernames:
crazybitingturtle
IvanderSchreckliche

Duplicated usernames:
120
343
4v4
509
7mk
Abdullah
Adv
Algae
Amber
Amphibian
Archangel
babygirl
BAM
Bolted
brainstorm
Breanna
Brianna
Caveman
ceramics
Chevy
Cieran
cinch
Clefable
Coffe
Colour
Commonwealth
contempt
Debra
Defeated
Defrost
Degen
Dial
different
differential
Dunk
Dyslexic
Ease
Extorted
Executive
Fee
Fluxion
Font
Foop
Freestyle
Fuz
Garbage
GDC
General
gonzo
Hated
Herman
Hi_
Identifier
Imperial
Imperius
Influences
Jacuzzi
Jammer
Jeffery
Kouta
Land
Leave
Leveler
Lisp
Loam
Loyalty
Marz
MCA
Mediator
MGMT
Midday
Mima
Minecarts
Mitsubishi
Mo0
Mosh
Mull
Natt
NegativeZero
Nein
Next
NNB
Nonbeliever
nuts
OGx
Origami
OST
Other
OverPowered
Pamela
Pock
PopCap
Positron
Potent
Powers
Professional
sai
Scribbling
Seek
Sesame
Seventh
shaft
Shogun
Shoop
Shops
Skirmish
Skunks
Smidge
Snu
Stokes
Storyteller
Str
SVG
Tamera
Tanks
Tarantulas
teslas
thomson
Torch
Trilogy
TRV
Turbine
Uncultured
Vaz
Verified
Wavy
Whenever
wilde
Yard
Yourself
Zie

Thanks for reading.