]So, if the Times goes out of business, you'll sue the owners for denying you your right?[/B] It's one thing to say you have a right to buy something that is available, that's different from saying you have a right to buy it. There is no right to have specific magazine sizes available for purchase, any more than there is a right to have a specific newspaper edition available for purchase.
Any such restrictions on speech would be accepted only for reasons of a compelling government interest. Some people might claim felling fewer trees is a compelling government interest, but since so many of those trees were grown specifically for paper production, that's a tough sell. Some people might claim that a shooter, requiring more reloads based on lower magazine sizes, might only shoot 100 bullets instead of 120, and kill 18 people instead of 20. Is that a compelling government interest?