One assumes that everyone in this thread suggesting straightening the hanger with something other than a hanger straightening tool has never straightened a hanger with a hanger straightening tool.
I bent the hell out of steel Lemond hanger in a crash - bent it back to straight and perfect in 2 minutes with the alignment tool.
What some of you are forgetting is that the tool also protects the shape of the threaded portion of the hanger, preventing it from ovalizing or kinking.