leet is pretty easy to understand if you know what the numbers and groups of symbols stand for 8D
! 7|-|!|\||< 1337 !5 |3 3!|\|9 |_||\||)3R |_|53|) 45 \/\/311, 1337 |)034 74|<3 4 70|\|9 7!|\/|3 70 7'/|* 0|_|7|-|0|_|9|-|
Translation:
I think leet is being under used as well, leet does take a long time to type out though