Yes! Awsome
My whole guild used to do tons of LDoNs back in the day, it was our specialty actually instead of the usual big-time raiding.
The dreaded 'everyone-clear-out-the-instance-and-let-the-rogue-pick-it' chests! Poor guys....they were heroes if they got it off though.
The nasty little boxes would do a couple things, one cast a nasty AoE poison DoT that would eventually kill you regardless of level, make you uber-drunk, or blow up, and long term AoE fear (Which is why we waited till the end of the run to deal with them....). Not your choice, and the effects were uber-nasty, but made for some fun stories.
The chests were around trapped around 90% of the time (ballpark figure).
We usually cleared everyone out at the end and let the rogue handle them cause' the AoE effects filled most of the instance. They were though a great source of some neat instance specific drops, gems, coin and Augmentations. They had generous loot tables.
You just had to 'de-trap and pray' most of the time though.