Out here in the PNW it's not unusual to see 2000 racers at a given event. Apart from the Cat A women, the women all race together with staggered starts. So the Juniors get their own time. But a lot of the juniors will do a second race so I will encounter women juniors in the women's race and male juniors when I race singlespeed, which is combined with men's Bs (about equivilant to Cat 2). I'd have to say that the juniors on a whole usually don't pass nicely or don't accomodate passing appropriately, but they are learning and I try to keep that in mind. Is the course a little crowded sometimes, sure. But the way I look at it, that's cross. Learning how to deal with other people on the course is part of the game.
I'm OK with it all. Nobody's paying me to race so what difference does it make in the end? I'm out there for fun. Do I get annoyed when a junior passes me kind of tight and doesn't even announce that he's there? Sure. But all it all, it's not going to change how I place and I'm confident enough on a bike that I can stay upright with some incidental contact so I don't let it bother me.
Living life like there's no tomorrow.
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2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS