A plasma screen has a tempered glass front. Tempered, hardened glass. An LCD has a plastic, as in soft, front, exactly the same as a laptop screen. Which do you think will stand up to finger prints?
And no, a plasma will not crack unless you drop it. They are both designed very rugged. For your needs, plasma is the choice.
I want to buy a 42 inch Plasma or LCD. I have researched both extensively and now my criteria has narrowed down to which is less fragile. I have two little kids and can't mount the TV on the wall as my rental agreement does not allow it. I know that Plasma is very fragile - the instructions for Panasonic models state that that the plasma can crack if you lay it flat instead of upright when installing it. Wanted to know it anyone had insights whether LCD was studier in terms of accidental damage (by toddlers). I am not keen to buy a DLP because it takes too much space.