Achievements are dumb. Why even have them in the first place? FFXI handled this better in the way of titles.. rather than giving people a worthless numerical value that doesn't mean crap besides "Oh, look, I've done more than you have, LoL."

I'm going to agree with OP on this. I think that if the OP is in a party with people and he's trying to do behest for experience - GOD FORBID THAT PEOPLE ENJOY THEIR LEVELING - the 50 should be the one to either a) leave the behest alone until these people leave or b) go to another camp altogether. There's absolutely no reason one 50 should have the entire reign of a public event just because he wants his pretty little number to grow; people should be more courteous and step down when they see other people in need of something.

Basically, in this case, experience points for a lower level always trump the need of some chump 50 and his achievement. Doesn't matter how you look at it, but I don't think anyone can come up with a valid defense for the person ruining a party's behest.

On the topic of instancing: just because it's open world doesn't make it fun. Have you ever tried doing caravan or behest with friends? You can get to a camp that has nobody on it, and your party can monopolize it for all of one run before some people without a party will come and take a spot. If instancing means people can do some of these events with their friends, and be able to communicate properly and make the most out of a run, I'm all for it. I'd probably feel the same way about behests, if I actually did those.

And before anyone attacks me saying "Hey, I looked at your XIVpad, you have 3 50s!" I'll have you know that the only achievement category I have unlocked is Grand Company-related stuff. I really don't give 2 damns about a pretty little number that won't do anything for me at all.

OP should be able to behest in peace with players his level without some 50 stomping all over his fun, whether intentional or not. It gives people a shoddy reputation, and actions like that aren't easily forgotten.