ChuChu,
Scattering pingers around is quite as likely to create false leads, red herrings, so not likely. Just as installing recorders in the fin seems complicated from the point of view of access - as has been mentioned in this thread.
A concept that seems difficult for people to understand is how technologies race against each other to keep up. The FDR and CVR technologies are sometimes described as "ancien"t but the airframe designers - who accommodate that equipment - need to use existing designs as their starting point. It becomes an issue of how many tails does the dog wag or, how many tails wag the dog.