Do you imagine google can ever panalyze any wikipedia page due to link spam?
Google can't panalyze web 2.0's because of high authority.
In my previous experience and observation, Google doesn't quite work like that.
I have seen subdomains of normal websites penalised or de-indexed, while other subdomains of the same website were ranking just fine.
I remember a guy who used subdomains to churn and burn, and after a month or two when the subdomain, for example, 1.website, got de-indexed, he would move the whole website to 2.website, and 301 re-direct the links, and the new website would rank almost immediately.
Then 2 months later when 2.website got de-indexed, he would move the whole thing to 3.website and it would rank again, etc.
So it seems to me that Google treats different subdomains as different websites, and could, in fact, penalise cars.wordpress, while not penalising bikes.wordpress.
So what I'm asking is, do you guys actually point 500,000 spam GSA links at your web 2.0's, and does it increase their power, and do they ever get penalised?