As sort of mentioned earlier, if you are lifting, there is more pull from the "connecting rods" (technically not tie rods i suppose) on the steering rack causing the seals to be pulled out on full droop, then you lose all of your power steering fluid. If you're keeping your stock shocks on and hope that your shocks will limit droop you are going to decrease the life of your shocks.
Conversely, if you are lowering your truck would the concern be bottoming out in the rack? i haven't seen the insside of mine.

when looking for a container to hold drained brake fluid, find a container that is different from the beverage you are currently consuming.