Camping NMs has always been competitive. I don't think anyone expects to have first come first serve privileges on those. (Though teaming up is usually an excellent option imho)
I don't even think people EXPECT fc/fs on Gil Farm Camps. However, that does not change the foolishness of not doing your homework to maximize the value of your time. That is what I was getting at on my point about the leech camp, lol. Seriously, there are THREE places you can make just as much gil per hour IN BUBU. I do admit that the inventory space required for the other two options is a bit larger. Meaning you get more items of less value in the same period of time. The gil per hour is still from npcing items and parking a mule at the op if that mule's city controls the OP solves this issue completely.
I actually prefer the other options most of the time just to avoid someone trying to out farm me. (Honestly, I like to AOE farm on blm and that is next to impossible if people are pulling your links off you.) I am advocating for not only being considerate of your fellow players (you'll likely need their good will one day), but also for the self interested reason of maximizing your efforts.
The issue is the same with EXP camps. Competing with another party, while another camp with similar exp per hour is wide open... is silly and a little willfully ignorant. Doesn't mean a player is a bad person, but it does say something about their skill set in game.
To sum up my only real point here: Doing your homework and using the search feature will not only prevent player v player conflicts, BUT it will maximize the effectiveness of your own time spent. If you enjoy competing, that's fine, but it could adversely affect your reputation on a tiny server if you often try to grab exp and gil camps from others.
I admit, I am by no means perfect. I have totally been guilty of this same foolish behavior. Its a little like getting caught up in "Winning" an ebay auction to the point you over pay just to outbid a competitor. My goal is to learn from my own mistakes and maximize my enjoyment of the game. I hope you share this goal since FFXI is a cooperative game more than a competitive game.
