Hi Newt,
You're asking a couple of different questions here.
1) I would not post photos without written permission from the source, and I would be very careful about hearsay regarding the origin or application of photos that came into my possession.
2) I have posted pictures from TAIKAN-TEN 2000. It's possible that since that time, there are rules, regulations or laws that prohibit it. I don't know, but at the time there were no such restrictions on me that I am aware of.
3) If you have legal questions it is probably advisable to consult a legal forum, rather than a bonsai forum. Here on bonsaiTALK, everyone is biased by a desire to see your photos. There, on legalTALK the only bias is a desire to consume your firstborn.
Regards,
Matt
"I am not a lawyer, but I play one on TV"