Don't cut like tin? Orly? It might have to do something with the fact they're probably steel or some kind of alloy... I mean, is this really a surprise? Has anyone ever tried to even bend one of those brackets? I can tell you they're pretty resilient .
BTW LOL at the "mod" xD ... they should "mod" a paper funnel with a box fan attached to it held together by duct tape to finish the look...