Of course most anyone would be against them, but personally I think it's a consequence of how laws work and how word of mouth works. Remember the lady who bought coffee at McDonald's and managed to burn herself? She did that, but McDonald's was held responsible.

The other example is Windows. For years and years it was known as a horribly unstable OS despite the fact that most of the failures were caused by poorly written 3rd party software. By locking things down more, Apple makes it harder for 3rd parties to make them look bad.

citing the mcdonald's lady is a bad idea - it just shows that you don't know what that case was all about. see http://www.lectlaw.com/files/cur78.htm

fair point about apple benefiting from their restricted ecosystem, though note again that it's directly at the expense of their users' freedoms.