As bad as it sounds, one guy from a previous job used to give a "panty-line check" to myself and another co-worker, looking to see if we were in "granny panties" or a thong. I never thought much about it until then or think that anyone really paid attention. It actually made me a little more aware that those lines are as visible, and are not too flattering. Now I am just a little more cautious, and try not to sport panty lines. BUT, also have to mention that thongs can also leave an ugly line. Have to find the right lighter material and make sure they aren't a little tight or they can show too.