It would be good for social engineering.
btw, if that hex is at the beginning the disk (not the partition), thats not where the bit is (assuming my pendrive works).
something i did find however, on the diskprobe program that maxdamage mentioned, there is a "media flag" option under fat and ntfs boot sectors. Its really odd though, hard drives are B(something, i dont remember, at school atm) and my pendrive is set to F9 (again, i think). Setting it to whatever the Hard drives are just throws FAT out of format, and gets reset during a format.