I have a usage tip for how I forced users to go through a form. This was not a form that users wanted to do like an application to get a promotion, but an updated user agreement form I required them to review and check "yes". As expected, 10% didn't bother well beyond the deadline, and I had to get creative.
1. Create new group. 2. In group permissions, do quick set "no" for everything. 3. Yes for "view" (the first one), and yes for "can view forms". 4. I manually changed those users' PRIMARY user group to the new user group. So now, their entire access to the whole forum is blocked. 5. I made a promotion within the form settings to change their new temporary primary user group to "registered" after the form was submitted.
This solved the problem. Users still had to click on the form link at the top, but they couldn't do anything else. I had like 3 users that couldn't find the form link so I created a big ugly notice that had the direct href link to the form in the notice box.