Having hit a few in my day (and yesterday, losing my group mate an imm prize!
) here is some advice.
When travelling in areas you are not totally familiar with, check your exits. Al you need to type is: ex.
If you see an exit that look ominous - sharp rocks, certain death and others - don't explore in that direction as you will hit a DT.
Blobbie was nice and downsized the penalty of a DT - it used to take ALL of your worn and carried gear. Now you lose 2 items that are worn and 2 that are in your inventory - but not fun nonetheless!
EDIT: Make that 2 DT's in 14 hours. Lost: 3/3 Black Watch, Virbius, Armbands, Stone Leg plates - and who knows what from INV.