The announcement says it's OFF by default, so I assume there is a way to toggle it? But I've just spent some time looking in the console and can't seem to find any setting for it.
Re it being "fundamentally a good thing", yes, but there will always be those few students who abuse it and record not-their-name. Personally though, I'd still turn it on for everyone, and deal with the exceptions. We already live in a world where "the few" continually ruin things for "the many", so maybe the few just need to be pulled into line.