I had a few sites that I occassionally socially bookmarked at social monkee. Well 2 of those sites were killed by Penguin. I build all my sites the same way and obtain white hat links.....I never spam. But I tried social monkee and took a big hit.
I am seeing referring sites in Google Webmaster Tools like
all sites that I never physically visited which leads me to think they are social monkee sites.
Anyone else notice something similar?