Can't be named for legal reasons?

The parents and their lodger in the Baby P case can't be named for legal reasons?
Why the bloody hell not?
They were his parents, and are obviously guilty as they were the only ones in contact with this poor child!
Fortunately, someone got hold of their names and addresses, and have posted them on the net. So I hope these bastards are getting the abuse they obviously deserve!
The animals!
String 'em up I say!

However, I just don't understand the "legal reasons!"

I know of someone, that after 30 years, was accused of sexual impropriety.
This case has been going on for over 18 months, and he has since been aquitted of all charges.

However, his name and address was plastered all over our local newspapers!
I was always under the impression that you were innocent until proven guilty!

He has since lost his job because of it, lost all credibility, has been ostricised (is that how you spell it?)
suffered endless abuse, and has been beaten up on a number of occasions.

If this poor man can be named without trial, why can't Baby Ps parents be?

A very confused Worm................