I personally don't mind which license type someone chooses to deliver their product with, but I think it should never be used as a shotgun against the developers, contributors or organisations that have been using / developing the software to force them into agreements that were unrecognised prior...
Many times Microsoft has been barracked for its "anti-open source" stance, which quite frankly has never existed. However, since we have always made software available under various licenses, it was decided that it was time to get these officially recognise by the people behind the dreaded...