One of my old clients had that, in that every time you went on their public website, it'd display the "disclaimer" page until you ticked a box to move on. Also, one of their internal applications required users to tick a box saying they'd read some "news" before they could move on.
I tried to talk them out of it, but they were convinced it offered them some legal protection. Of course, it is unlikely, as everyone always ticks the box without reading the text, which defeats the whole object of the exercise.
This was also the company where the CEO insisted that he didn't want to log into the main business application, as he couldn't remember passwords. So, he "helped" by suggesting that his account, which was a super-user, should have no password. Eventual compromise was he used a space as his "password", although everyone knew it.
Bottom line is that it is a mis-guided attempt at "security" suggested by a non-technical lawyer, but makes the system less secure.