with a lot of spacers (speaking about 2.5cm and up), it usually represent a poor size of frame and the person should have gone to a bigger size with a higher headtube height. there are some issues with flexure in the front end with too much spacers and as long as the stem is within the height prescribed by the manufacturer, then we are really talking about visual factors. People who ridicule are the same purist that we see in other trolling threads.