2009/10/25 Daniel Kinzler daniel@brightbyte.de
This is a matter of much debate and disagreement, as old as copyleft licenses. It's "strong" or "viral" copyleft vs. "weak" or "soft" copyleft. Traditionally, the FSF takes teh side of strong copyleft with the GFDL, and the CC crowd tends more towards the weak variant, implying that the share-alike requirement does not apply to "aggregate" works, only "true" derivatives. To me, that makes more sense in practice, even though it may be less desierable in principle. The distinction is tricky, however.
I can't force anyone, but I'll post my own contributions as PD, if allowed, and I encourage other to post their contributions as PD too, if they like.
Alex