No
Why are you letting YGNR accounts flood the forum, chess.com??

urelius you're feeding the troll giving it all this god damn attention. "Don't feed the trolls". If you just ignore it, and a lot of people do, there WILL BE NO PROBLEMS they get bored. Or you can look at the positive side of it, some of it is funny. They look for things like this forum, or you insulting them or something that's what they like because frankly, getting someone to rage online is funny. You see it in games all the time.

Am I the only one who doesn't know what a YGNR is?
No.
No. I don't know YGNR too and why many hate him.

Am I the only one who doesn't know what a YGNR is?
no
YGIW???? YGNR ALARM!!!!!!

YGNR was but a relatively brief account of someone who is notoriously more infamous.
Who?

Perhaps deciphering Quwu, what these 4 symbols stand for will aid in solving his identity. Patterns become visible, similarities soon are uncovered, he never changes - not really.

No, very few of the 1000's of usernames are weird. Most quite common and mundane in fact. The ones with the hoped upon longevity, where very similar personas prevail, are always 4 letters/numbers with a "hidden meaning". YGNR for example stands for Young Girl No Respect. Compare to the OP's profile.
"getting someone to rage online is funny" You have a twisted sense of humor.
Aight old timer. Ever pranked someone? You got them mad, then you laughed about it. So do you have a twisted sense of humor too?