You know, it's funny. They call them "leggings" because they aren't "pants". Those quotation marks were probably misused and that period was probably misplaced. But deal with it.
Last time I checked.... wearing semi-sheer stretch pants was only socially acceptable if you were currently filming a scene for Xanadu... and even then... it was sketchy. Would you wear tights without a skirt? No. Well guess what... when you wear leggings without a skirt... its pretttttty much the same thing.
If I had a nickel for every pair of inappropriate panties I have seen through a pair of thread bare leggings.... I would melt them all down and make a giant nickel plated spoon. And then I would take that spoon and gouge out my own eyes with it.
You know what is even better/worse than just plain old leggings as pants? Leggings as pants worn with boots. You look like a skanky jockey.