Submit agreement form before can view a specific forum

[PSS]

Searched but could not find a mod:

- user enters forum or subforum
- cookie X checked
- If cookie X found: show posts.
- if cookie X not found: show user an agreement form.
- only when user clicks "accept" form is sent, cookie created and user let in to that forum.
- when user accepts the form, user database is updated (a new freely named colum) with tinyint 1.

Best is this would be done with many (single) forums each with custom form and custom "receipt" cookie and column name.

Anyone? Thanks in advance.