Actually, that's a good idea. Use them for crimes, have them broken, toss them away. Lather, rinse, repeat. And they'll keep hunting after a bunch of ghosts that use the names of Short Stops from the 1950s-Era of Baseball.
Finally, there really should be some rule about SINs breaking down, and slowly becoming useless. Then find a drunken, unconscious bum and place a el cheapo Stuffer Shack Vending Machine CommLink on him/her with the SIN and, hey, time to go begging in the downtown core!