could have done without whoever invented mobile phones, especially the ones that play music from a speaker for everyone around to suffer
And the world could certainly have done without Thomas Midgley - inventor of leaded petrol and CFCs:
http://en.wikipedia.org/wiki/Thomas_Midgley
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"The Crimean War occasioned the invention of hand rolled "paper cigars" - cigarettes - by French and British troops who copied their Turkish comrades in using old newspaper for rolling when their cigar-leaf rolling tobacco ran out or dried and crumbled. "
http://www.diggerhistory.info/pages-conflicts-periods/other/crimea.htm