Double rolling on items is disgraceful, and leads to should lead to listing IMO.
I advocate your loot is your loot.
I am cool with limited or guild only rolls.
I am cool with passing to a guildy, friend, or whoever you deem fit.
I am indifferent on the topic of selling raid/bound items via /tells. I do not participate in this, but I get why people do it.
Entering into a /roll 1d-- situation only to be doing it as backup for a guildy in a PuG is just bush-league behavior.
This topic has been beaten to death, but +1 for investigating and posting screens.