Mostly because it's not funny. Here's a hypothetical April Fools Day prank:

Person1: There's a spider on your head.
Person2: [rubs hair for half a second]
Person1: APRIL FOOLS! dohohohohohoho!

Now imagine that, for 24 straight hours, and with all the text upside-down.

i mind them rules couple times on fuzzy world aka tfw2005 board

Ironically, I joined because of Kickback spamming Tokunation in the fuzzy world. So far, no regrets.

It's like, if I've ever had a complaint about them, they did the thing I complained about in the episode, like the return of "kirifuda" albeit with a much funnier footnote. The Meteor-san gag was damn funny though.

he said no apr fool jokes on tokunation and this still new

I'm pretty sure the attempted murder of SPLIT LIP on TFW2005.COM was a joke. Even SPLIT LIP tried to kill SPLIT LIP.

I bet this IS the April fools joke:p

i am thinking really good joke on other members on tfw2005
i am thiinking do kajiu world or brave robot world insted fuzzy world

I've already begun the next year's April Fool's Joke for TFW2005. It won't be the Fuzzy World if I can help it ... but something cooler and more unique. Just wait until you see it all in action and completed.

wee'll be waiting. :)