The typer often thinks it makes them look cool by adding the unnessary X, more to the contrary, it makes them look like a total retard, with a mentality of a 12yr old.
Billy: You must be 12.
powerrangerboy2234: OMG how do you noe?? lolx
Billy: From the way you're typing you freakin' retard
R3taRd t33ny B00p3r: lolx