Google SafeSearch 'Moderate' Setting Fails to Filter 'Playboy'
Empirical Analysis of Google SafeSearch

The screenshot below shows a comparison of Google searches for playboy using an ordinary Google search with all filtering disabled (left pane) versus using SafeSearch in its intermediate mode ("filter explicit images only") (right). The results are identical; SafeSearch's intermediate mode fails to cause the blocking of any of the top ten results for 'playboy.'

Snapshot showing that Google offers identical results for a search on 'playboy' whether filtering is disabled or set to 'moderate'