basically IMHO, if you work on GPL project, anyone also can build it with your source.
my suggestion you should make a code to protect your rights.
- create a code with encrypted text (md5/sha/tr) to protect marcin@maclaw in middle of kernel code. so anyone cant replace it & claim your work easily.
and dont judge/blame anyone who want to try and learn about it
hmmm, but i also not 100% understand with GPL