This is just dumb.
No manufacturer can do anything about accessory kits. They can't show any kind of "loss" whatsoever, and in fact modifications remove most of Hasbro's liability as soon as the user takes a tool to it. And they clearly drive sales. Every OMW kit that relates to a Hasbro blaster requires the user to buy the Hasbro blaster.
I think somebody misinterpreted whatever Hasbro actually did say. And maybe Hasbro likes it that way.
Thats true somewhat true, but when talking with a corporate giant, the normal rules don't exactly apply. It doesn't matter that Hasbro might lose whatever legal action they brought to the table, OMW would lose by default of not having the resources to fight the legal battle. And I think it's possibly a much more murky thing that it would seem at surface. Patents, and copyright infringements possibly. *shrugs*