I'll put u in context about the screenshot (i'm Dy), "A" doesn't claim the 1st boss loot, however the ppl was kind with "A" and leave the loot to him (i didn't bid anything just cuz i was not interested, if i have interest i just bid), and to be clear it was a 6 ppl pt, nobody left the pt before "A", "A" just throlled the whole party members (completed his daily quest got loot and leave), after that i've said the rest that i have orb too soo how is for 2nd boss the moml rule applies, used, killed kaari, take my loot, end of story.
My point with the screenshot is directly related to the problem exposed here, even if there is no rule about 1st boss many ppl in game thinks that is a matter of courtesy with the orb owner, and if you don't show that courtesy or kindness many ppl with that missconception just treat u like a d1ck, an a55hole, etc., the screenshot just proves what's the fundamental problem with that attitude, this is not a perfect world, is full of a55holes that abuse from the ppl that is too kind, there is no point to show courtesy to a "Jhon Doe" on the 1st boss, the main reason is cuz that doesn't require orb, and the second is cuz put your trust on a complete strange here is just stupid, many of them will just abuse of that.