Data retention question

[Roland Perry]

In article <20140725191541.5984402.41509.491 at gmail.com>, 
bakeryworms at gmail.com writes
>If the data retention is about terrorists or paedophiles,

They are by no means the only serious criminal activities.

>then why not just have targeted logging of the parts of the Internet 
>that relate to those activities and those who visit them? 

If only it was that simple.
-- 
Roland Perry