Those padlocks with the retaining "rivet" instead of a screw can be taken apart by punching the rivet out, through the shackle hole, with a slender punch. The same rivet can then be reinserted and spread with a punch or phillips screwdriver.
Nothing is foolproof to a talented fool. Wisdom is not just in determining how to do something, but also includes determining whether it should be done at all.
no problem 
