I don't favor any cookie cutter approach to letter writing. Sometimes
humor works and other times a more threatening formal letter is in
order. I wrote to Wendy's headquarters six weeks ago about the two
occasions we found hair in their Frosties from the same location. So
far there has been no response. We have not been there in six weeks
either. Some companies have a culture that responds to complaints and
other companies ignore everything. When I know which category they
fit, I act accordingly. Further complaints on deaf ears are a waste of
my time.