Not that obvious. Google WN1's and you'll not find any results for anyone else using the same series of letters and numbers (i didnt anyway). google WN1 and you wont either. google WN1 and cricket and you'll get a postcode of some cricket clubs.
Not to me it wasn't. And not to others either. Although it was cricket related, it did take me 2 or 3 attempts at working it out. I ended up thinking - why not just type world number one? And be honest Mario, it's hardly a one-off. The lad does this regularly. And SuperTyke guessed mine straight away so I suppose you're right, and I'm wrong. I usually am, despite an IQ of 147.
I'm not saying that YT, you're not thick. Maybe you didn't get what Phil meant, I sometimes don't understand his posts so I ask him. Seeing people single him out for mockery just looks like bullying.
I had no idea what it was, but then again I am not surprised either, because I do not understand the need to just put single letters and numbers instead of the full words, stupid and its not only H/T that does it!
I think a lot of it is text speak Mark and it seems to be almost like a second language with the younger generation. I know my kids use it on text and media like Facebook. Confuses the hell out of me at times.