Microsoft [...] have no reps with black top hats, capes, and stiffly waxed moustaches going around the world sabotaging other products.
"The AARD code was a segment of code in a beta release of Microsoft Windows 3.1 that would determine whether Windows was running on MS-DOS or PC DOS, rather than a competing workalike such as DR-DOS, and would result in a cryptic error message in the latter case." (
source)
"Electronic greeting card firm Blue Mountain Arts has won another round in its battle with Microsoft Corp. Late Thursday, a Santa Clara County (Calif.) Superior Court issued a preliminary injunction stopping Microsoft from setting up filters in its Outlook Express mail program that treated greeting cards from Blue Mountain as junk mail. " (
source)
"In 2002, Be Inc. sued Microsoft claiming that Hitachi had been dissuaded from selling PCs loaded with BeOS, and that Compaq had been pressured not to market an Internet appliance in partnership with Be. [...] The case was eventually settled out of court for $23.25 million with no admission of liability on Microsoft's part." (
source)
Microsoft has a long history of "sabotaging other products". I'm not saying they're stopping OEMs from bundling Linux, but I wouldn't make tinfoil hat jokes about somebody who's suggesting they do.