Hi skid..
Good idea - well depends...
If you only use PC to clean up the SD card after of loading shots etc then all ok.
i.e you control what is left on the card. Your call text file and/or Jpeg is best.
If you ever use the SET menu function on the GOPRO to delete all - it does the equivalent of a hi-level format and then writes the 3 folders back onto the card - so anything on the card is effectively gone without doing a forensic recovery!!

I try to ID all my kit - since I flog it to death before replacing!!!

Cheers
AP