Money from a hacker is completely harmless. There is no way an item a hacker gives you FROM THE FLOOR can be harmful. However, if he gives you an item from the recycling bin (expecially little ones that look like a leaf and have no name) you should dispose of it imediately if you do not know what you are doing. Holding one shouldn't do anything, but if you recieve one of these, put them in the recycling bin and let it be emptied. Make sure no one else gets ahold of this, though.