There's been a lot of discussion lately about trying to make stego files not have any identifying marks, so that usage of stego would be indistinguishiable from noise. A more effective option might be to insert obvious (or somewhat obvious) stego messages in lots of graphics. Take every graphic file you own and hide something in it with a stego program. Put PGP messages in them (even including the obvious ---- BEGIN PGP MESSAGE ---- headers). Or a BBS ad. Or just cute little messages. Then distribute the files that way. Hopefully, people will take these images and pass them on without ever knowing there was stuff in them. If enuff people do this, graphics will become so "polluted" with stego messages that your truly secret PGP messages will be hidden in plain sight along with all the other graphic files full of stuff, and won't stand out. Plus, you could plausably deny having put it there, claiming that it must have been that way when you got it, and that you didn't know it was there.