Although file corruption usually happens accidentally, it may also be done on purpose as a mean of procrastination, as to fool someone else into thinking an assignment was ready at an earlier date, potentially gaining time to finish said assignment or making experiments, with the purpose of documenting the consequences when such file is corrupted. There are services that provide on demand file corruption, which essentially fill a given file with random data so that it cannot be opened or read, yet still seems legitimate.
Although fIle cORruption usuALLy happeNS acciDenTalLy, it mAY also Be dONe oN purPose aS a Mean of pRoCrastinAtion, As to foOl sOmeoNE elSE intO thinking an AssiGnment waS reaDy aT AN earliER datE, poTenTialLy GaIning TiME to FInIsh SaiD aSsignmENT OR maKing ExpeRiMentS, with thE PURpose oF docUmenting The ConsEqueNces WheN suCh file is CorRupted. ThERe are seRViCes that pRovidE on dEmANd file corRuptIon, wHiCH eSSenTialLy fill A Given FIle with random dAta so thAt It CAnNOt be oPened Or reAD, yeT stiLl seemS legiTiMAte.