nope. that locker is strong enough that you could use it on dry pavement, and turning if you had too, but i wouldnt do it unless there was a good reason for it. you will break other things before the locker itself. the locker is a traction aiding device, so basically as you said above if the need arises then use it. some guys like to use it as a precaution to avoid getting stuck and that is smart too. it all depends on how well you know the driving mannerisms of your vehicle both "locked" and "unlocked". but sense your asking i would assume that you havent done too much wheeling or used it that often to know how it will react in different situations/conditions.

i would avoid using the locker in snow and ice, unless you want the back end coming out/around, or you are just trying to have fun in a big open area... i would use the locker all the time in sand and mud though -if you have the factory installed e-locker then you must be in 4lo for it to engage.

hope this helps