Google: Spammy Widget Links Violate its Webmaster Guidelines

[engine]

As if you didn't know this already, Google has now made it abundantly clear that spammy, keyword-rich, hidden, or low quality links in widgets violate Google's Webmaster Guidelines. The result of that violation we know could mean a penalty, or worse.

[webmasters.googleblog.com...]

Obviously, it's finding more an more and felt that it was worthwhile publishing a confirmatory message.

[Selen]

Many websites use external scripts like jquery, angularjs, mootools etc. (they have hidden reference links within the source code), so it's good news to sites that don't use such external libraries because their competition may be penalized and they will be not.