Consumer data should be one of those things which most companies consider something toxic but necessary so they handle it with care and use the least amount possible rather than collect as much as possible and worry about things later.
RadioShack may not have the reams of data an ISP has, but still need a precedent for future data handling and ownership resolution. It'd be great to see this kind of data devolve back to the consumer, i.e. destroyed, once its original user is no longer there to use it in support of ongoing business operations and should not be a mainline of business per se.