Just google data protection act

I also have a Privacy Statement.
And My Terms and conditions have getting me out of more than one situation due to my members.
It will also depend upon which country your in

As Driv says
don't give any of there details unless its the police lol.
And even then ask them to say why.
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True Storey
A forum not a million miles from where i am had 3 admins.
1. Admin had gaven details of a members private messages to a
friend who had been dumped by his girlfriend.
The admin disclosed, the conversation details of there
private messages to the dumped boyfriend.
And the dumped boyfriend reviled his source.
Guess what that was the end of that site with over 2,000 members
and it was pretty active. The Privacy and Trust had been lost.