Moral of this fiasco: when uploading images, always put down the link to the original in the Source column, or don't upload it at all. Saying "internet" or "image board" does not cut it.
After reading some topic, there are different groups.
One is the hard liner, they don't want illegal re-upload of works elsewhere. This means in their opinion OYP is included. There's even voice that say OYP has to be closed first because we became the source for other sites.
The other is a more moderate group. Suiso is probably in this group. They have no problem with OYP, but 100% against something the Japanese call affiliate blog. This is sort of Digest blog with various information made for the main purpose of getting money through the loads of ads in the page. Big majority of the anti-share group is in this one, because affiliate blog admins are getting money from other peoples' work without giving any compensation.
Take the anti-affiliate out, and the hard liner is a minority.