Why would they do that? They use open source software in their products.
I have to go with GE on this minute point here. As an example, SCO is on a lawsuit binge against open source, it has even claimed that open source is unconstitutional, yet it uses open source in its products (although its products are not based on open source as OS X is).
Of course, the difference is that SCO is run by incompetents with no real business plan except for "jackpot justice," while Apple is out to make real, earned money the old fashioned way -- by making stuff people want to buy.
Apple only gets an itchy trigger finger on the legal department when people do tortious or illegal things to screw with its business plans, like hacking Apple's proprietary code or releasing confidential corporate information. And, to be honest, I haven't always agreed with their tactics, which sometimes seem a little too heavy-handed.