Microsoft strategy is more interesting: they dont block products but rather use liscense fees that are slightly less than the costs of going to court against Microsoft. Eventhough, their patents are hard to enforce, and likely wouldnt win, its irrelevant.
So, to compare the behavior to other industries: Microsofts strategy is racketeering Italian mob style "we own this town", while Apple is raging a full on war, with any competitor, much like how a mexican drug cartel operates.
Google on the other hand, behaves more like a community bank. The members get free tech, but also take most of the risk, yet if they succeed, end up making Google more profitable.
The notion that all three companies are equally abusive, is ridiculus. They are definately operating with different policies. Whether that is due to convience or moral convinctions, is up for debate, but when looking purely at behavior in this space, Google is the good guy...