It is true that you should be polite and all, but I think this text goes too far with telling people how to act and dress. Russians do not actually dress that conservatively. In the summer you can see local women with very revealing clothes and men with shorts and no shirt. The only places where you have to dress conservatively are religious buildings. Everybody must cover their shoulders and legs. Women should wear skirts instead of pants and cover their heads. Everywhere else you can dress however you like.