I do not recall seeing a guy wearing his kilt backwards, but I have seen one wearing his with the basting stitches still in place. Admittedly, it was at a social function at which I was also kilted (what else?!). I simply took him to one side and quietly asked him if he realised that they should have been removed. In all truth, he did not. He admitted that he had collected the kilt just minutes before attending the function and had changed into it on the premises. After disappearing for a few minutes, he reappeared minus the stitches. Later, he made a beeline to give me his thanks. "Now I know what everyone means by the 'swing factor'", he told me!!