I actually enjoy hunting public land... I like the idea of hunting common ground with everyone else and still coming out with the best buck, or at least making an honest attempt. The majority of my bucks have come from public land.
I don't mind seeing hunters,or in your case flags, cause it tells me where "not" to hunt. Most guys over hunt the same spots and areas for years, I just find the little over looked spots where they go around everybody else.