Web2& Social networking: helping police?

OK, I can't find the post about it; so here we are. "City Council Tells 'Dumbest Criminal' To Stop Posting So Much Evidence To YouTube" - Leeds city council seems to be also dumb? http://www.techdirt.com/articles/20080521/1350411194.shtml (22 May 2008) http://www.dailymail.co.uk/news/article-1020951/Britains-dumbest-criminal-banned-boasting-offences-internet.html?ITO=1490

But a more direct move from a social networking site is not funny at all: people have been banned because of their age (over 36) for fear of porn and sex abuse. Apart from the ridicule of the situation (how on earth all over 36 can be suspected?), it is a pretty dangerous move: it's called private justice for fear of prosecution. "Social Networking Site Bans Anyone Over Age 36 To (Sorta) Deal With Sex Offender Law" http://www.techdirt.com/articles/20080522/2356201207.shtml (23 May 2008)