Please stop reporting all OF models as spam. If a post is off-topic, report is as off-topic. If community rules forbid OF models from posting, report that. If a user is flooding a sub with multiple posts a day in a row, that’s a legit report as well.
Otherwise a post by an OF model is not in and of itself spam, even if it is made by a <ferengi>female</ferengi> with the temerity to control her own sexuality.
I have a simple solution to this: If you are the moderator of your community, just put a rule in the sidebar disallowing OF links and references. Handle it on a per-community level.