Sadly, since LOL is spelled out when pronounced, I fear these immortal sentiments actually fail to produce a haiku due to the final line having more syllables than suitable.
Edit: perhaps I am just a dinosaur, and my ancient ways are no longer relevant for the cool kids. In that case, disregard.
Try to make a fully abbreviated haiku
WTF CIA FBI
WaPo DEA DOJ
LOL
Hahahahaha