Interestingly, my buddies and I have been adding fake G+ likes and fake YT subscribers to our YT channels and web articles, and all of the sites that we did this to were downgraded in PR (from 3 to 2) in August (thereabouts). Our YT channels point to our downgraded websites, by the way. The sites of ours that we faked the G+/YT subs were whitehat, and they have actually increased in traffic despite the decrease in PR, and all we have done is post more articles. The only mistake we seem to have done with these sites is that we have used 2 popular social media exchange sites, where we put the URL of the article/YT channel and bots or whatever/whoever can G+ or YT sub. My theory is that G and YT (YT is owned by G) were able to track the URL referral, so that every G+ and YT subscription was referred from the social media exchange sites that we use (thet are popular social emdia exchange sites that I am sure G knows about). All of our sites that we faked the G+/YT subs (about 10 of them) were downgraded in PR, which caused the advertisers to go nuts. With G being all obsessed with real authoritative links and websites being all about being shared legitimately, do you think that G can spot fake G+ likes and YT subscriptions and do they take it serious and will downgrade legitimate otherwise whitehat websites? I have a feeling they can and that they have recently acted on this. It's not like we used bots, we just put the article urls and YT channels on 2 legitimate social exchange sites and legitimate people can G+ or YT sub, and we don't pay for them. However, I'm fairly sure that YT frowns upon fake ubs or likes, so I'd think that G does too. What you say? Thanks! P.S: we use Adsense on all these 10 sites and we haven't received any notifications on Webmaster Tools or any notifications for these faked G+/YT.