are linux distro logos copyrighted?

[TheRecluse]

i was thinking about designing some t-shirts with varios distro logos/phrases on them. are there any legal troubles i would get into for selling them online?

 

[Snake-Eyes]

Deine Hosen sind da! Deine Hosen sind bequem und schick.

I'm pretty sure the non-free distros like Red Hat, you'd have to get the rights to use them.