All Invalid IGNS

[riot]

Name any igns that have invalid characters that once existed or still exist (Not including under 3 letter igns) I've got a few:
Mr.LoL
.Flow
Mr.Boo
Adolf_Hitler.
Internet.com
Mr.Denis
Cool.J
Steve#8
Cool Dude
Help Me
User-Unknown
Y-93
$
Got any more? Comment! (I'm curious) I'll add to this list

 

[Choo]

Y-93 used to play hypixel, how come he changed his name?

It was purchased off Doge and the buyer went flexing everywhere, mojang found out and changed the name.

 

[Filbie]

It was purchased off Doge and the buyer went flexing everywhere, mojang found out and changed the name.

Stupid retard[DOUBLEPOST=1523658358][/DOUBLEPOST]

It was purchased off Doge and the buyer went flexing everywhere, mojang found out and changed the name.

I also highly doubt that

 

[Choo]

Stupid retard[DOUBLEPOST=1523658358][/DOUBLEPOST]
I also highly doubt that

Why so mad, it's what happened. If you think I'm wrong why dont you ask Doge

 

[Filbie]

Why so mad, it's what happened. If you think I'm wrong why dont you ask Doge

I was talking about if it was true the guy is stupid

 

[Choo]

I was talking about if it was true the guy is stupid

OH lol thought you meant me, yea I agree what he did was a dumb decision

 

[riot]

ADDED: Cool.j and $