Though in Microsoft's case, if they even consider buying Joe's lemonade store down the road the technology world screams anti trust and has an epic fit until the Justice Dept & EU etc get involved to investigate every detail for 5 years and then throw a fine of a few hundred million dollars at them.
So really your cry of unethical business practices has zero basis (in this instance) and shows plenty of bias on your behalf.
Uhm, hello, we're talking about Microsoft here. Show me one business decision they've made in their history that wasn't unethical. I'm sorry, but stating the obvious isn't a sign of bias.
Let's see...hmmm...
Was Microsoft BASIC - their original product - an actual source code swiped from DEC's BASIC? Well, its never been proven, so we won't count that.
Was MS DOS - originally QDOS - an unlicensed port of CP/M to x86? Check.
Did Microsoft illegally tie Internet Explorer to Windows to crush Netscape? Check.
Did Microsoft collude Apple into making Internet Explorer the official Mac Web Browser in exchange for continuing to develop Microsoft Office for Mac? Check.
Is Microsoft a convicted monopolist? Check.
Did Microsoft fund SCO's attack on Linux? Check.
And those were just some of the few examples that I came up with off the top of my head.
As for Microsoft having to have every move of theirs scrutinized by the US Justice Department and the EC, well, that was part of their agreements. Had they gone ahead and broken up the company on their own - as they should have done - there would be no need for these restraints of trade on their business models.