This thing is actually designed to be used in conjunction with an
"office" that straps into the passenger seat. I know a lot of
professors, unhappily called "adjuncts" and "freeway flyers" who have
set-ups like this in order to cope with teaching at two or three
colleges in a day.

I had something like this made of plywood in Peregrine. It installed
on top of the wheel rather than hanging from it.

It never occurred to me until just now that anyone would think to use
this while the vehicle was in motion. I suspect that the people who
have thought of that, and lampooned it on the amazon page, are
probably guilty of a similar sort of driving distraction.

Mark