You can play a role in fighting back against dangerous and illegal websites and unfair competition.

Google has long had a mechanism for reporting violators. Now they've souped it up.

Article on the announcement:

Google’s Spam Report Page Gets “Biggest Refresh” In Years

You have to have a Google account to make a report, but then you can report a wide range of issues including paid links, inappropriate content, infected pages, copyright violations, as well as "webspam". Webspam is any effort to trick Google into giving high rankings.

You don't have to just take these things. You can fight back.