If you DF the Primal/Dungeon/Raid/anything don't expect anything from anyone in terms of loot, unless you state your intentions right of the bat. Of course this does not guarantee anything, but at least your not assuming that people are naturally considerate of others, they're not.

Personally, if I'm aching for a armor piece I would go through my FC, and suggest you do to if you can't nab it via DF, FC's tend to be invested in their peeps and will usually lend a hand.

In the end of the day loot is loot and if somebody contributed to the win, regardless of intentions (Vanity or actually need it) they are entitled to roll for it, system permitting.

I've been searching for my BRD boots in CT for weeks and keep on losing them to BRDS struting i90 boots soemtimes. It happens, just carry on.