I will go ahead and mention this. This comes from SDC employees, the letters you send to the PTB are read and they are passed on and up.
SDC apparently does heed letters they receive. I have heard about backlash from letters and large changes that have come because of them. I would not wear it out writing letters every time you see something out of place but if its important some people still do pay attention when you take the time to put pen to paper and write them. Its harder to ignore a letter than a email message. If you feel strongly write them, the answer you receive may be bland because often they cant respond as much as they might like. The letters are not incinerated, they are passed up the line.