Perhaps you have been following the recent news about string of security breaches into Sony, PBS, US Senate, NHS, Nintendo, FBI, Unveillance LLC, ..... All done by the infamous group
LuLz Security.
I have looked at my logs and found out that yesterday my plugin
UA Police Pro caught and blocked HTTP request with this UA (user agent):
Is This LulZ
What is that? The UA looks like it might be an automated scanner that sweeps the web for systems that could be penetrated. It could belong to LuLz Security.
When the LuLz scanner tried accessing my site, UA Police Pro noticed that the UA (user agent) was invalid and denied the request with status 403 (forbidden).