Google soll angeblich testweise folgende Emails an Seitenbetreiber versenden, nachdem die Domains gekickt wurden:

Dear site owner or webmaster of [url removed],

While we were indexing your webpages, we detected that some of your
pages were using techniques that were outside our quality guidelines,
which can be found here: [link]
In order to preserve the quality of our search engine, we have
temporarily removed some webpages from our search results. Currently
pages from [url removed] are scheduled to be removed for at least 30 days.

Specifically, we detected the following practices on your webpages:
On [url removed], we noticed that pages such as
[url removed] redirect to pages such as
[url removed] using JavaScript redirects.

We would prefer to have your pages in Google’s index. If you wish to be
reincluded, please correct or remove all pages that are outside our
quality guidelines. When you are ready, please submit a reinclusion
request at [link]

You can select „I’m a webmaster inquiring about my website“ and
then „Why my site disappeared from the search results or dropped in
ranking,“ click Continue, and then make sure to type „Reinclusion
Request“ in the Subject: line of the resulting form.

Google Search Quality Team

Da das Gerücht sogar von Matt Cutts bestätigt wurde, muss wohl was dran sein.