Minecraft Forum Fails was a blog created by Tef somewhere in beginning of 2013. Its purpose was to screenshot funny, random, rude, weird, or humilating posts. The community could also get involved by sending links to Tef or Tucking_Fypo on MCF, by messaging him on the forums. If the submission was accepted, the submitter would get credit for 'finding' the fail.
Somewhere in May, Tef lost interest in it and the blog became inactive.
The blog was inspired by Xbox Forum Fail Blog which its purpose was the same, but for Xbox UK General Discussion Forum, of which, Tef used to be an active poster from 2009 - early 2010.
The logo was for it was made by Sgt. Traveler.