hello,
we (eonpal) crawl sites for adult content.
more info can be found here:
http://www.eonpal.com
However, If you want to be excluded from it, please send us list of domains and we'll block our crawler from going there.
or simply just block traffic coming with http referrer *.eonpal.com (this is what you referred as referral spam)
good or bad? your content might appear in search engine so I guess is good. if it's not, send us list of domains, we'll exclude them immediately.
I'll be around post to answer your questions, if any
cheers,