This is a unique exploit I figured out yesterday while I was in the DWB. If your down in the mine area and don't have a rebreather you'll take about 40% damage at painfully short intervals. This is a huge pain in the !@#$%^&* if you're trying to fight anything down there.
The poison DOT is triggered right when you enter into the mine area.
Pass the enterance area marked in the red rectangle and walk to a safe location, like where I've drawn a circle. There, make sure you are clear of anything that might aggro you and log out [use the /logout command and wait the full 30 seconds, don't just disconnect].
Remain logged out for at least a minute.
When you log back in you should no longer have the poison DOT on you.
If you walk back into the rectangle area the DOT will retrigger, but you can repeat this an unlimited number of times to get rid of it.
edit:
@psycosis
HUH did you even try it? Or are you just trying to work it out logically?
Let me do it for you.. even if you have no rebreather, as long as your not in combat you HEAL the damage done by the poison and regain max health.. its IMPOSSIBLE to die if you just sit there.
That aside, accounting for what I said the poison DOT stops while your logged out and doesn't return