Among Top Ten Attackers, see: https://www.mywot.com/en/scorecard/genieo.com
See: http://toolbar.netcraft.com/site_report?url=http://www.genieo.com
Just like http://www.webutations.info/go/review/genieo.com ignores.
Not convinced, read: http://www.wikihow.com/Delete-Genieo
Browser hijackers and browser search redirectors could be reckoned to the worst user annoyances.
polonus