Even if we have just started raiding Naxx, last run you hear me asking: anyone? need??offpecc?? noone? just to make sure they were not gone on a break while looting - and how can you be away on such moment? Just shows that Naxx gear isn't much to fight about if you did everything you can outside.
We use simple dice system with relaxed attitude: Be fair and considerate of others, rather than: mine!! all mine!! Ey, I wanted that.. - well, maybe someone actually needed it?
I also take note of attendance and how much items that person got before.
So far never had problems with it.