[hilbert42]

"...they have a variety of "typicality" profiles for the significant fraction of the non-criminal population..."

I'd be curious to know if it's fact or otherwise but I'd assume it's correct. Like the curious person I am, I'll follow a link in a story to a related matter that of itself is innocuous but it contains a link to some 'darker' site, and so on.

Thus, it doesn't take long to end up on sites that are 'questionable' and one realizes it's not a good idea to be seen hanging around them despite the fascinating info that they often contain.

It seems this is an occupational hazard for curious nerds such as me. ;-)