Pickpocketing bones from skeletons should damage them
ADOM has a bunch of odd interactions in various places that help add some flavour and make the game interesting.
At the moment if you pickpocket a skeleton and get a bone it's vaguely amusing. It would be even more entertaining if that actually did damage to skeletons - say 1d6. For low level skeletons this gives a chance to kill them, perhaps with the message "the skeleton falls apart". There could be a rare funny achievement for this - "Bone To Pick".