While some people get really excited over rubs, to me they aremostly an indicator of definite buck activity in an area. Rub lines tell me patterns of buck travel, and to some extent, the general size of bucks making the rubs.
I do not hunt rub lines, or single scrapes either, for that matter! What really gets my blood pumping, is finding multiple fresh scrapes in a small area! This tells me I'm in a buck's bedroom, and he will be checking these scrapes regularly. While rubs, and single scrapesmay not be re-visited for several days.