I don't remember if I or anyone else addressed this on "Survival knives".

I feel that a lanyard on a true survival knife is mandatory. No I don't really like lanyards all that much but in a true survival situation having that lanyard can keep you from loosing the blade over water, in the snow or over the side of a cliff or from a tree. The last thing you need to do is loose your only means of protection/food/water and shelter preparation.

So if you don't really want a lanyard on the knife all the time, at least have one ready to put on in case your outing does truly become a case of survival.