Thanks all! Interesting perceptions.
I think I have the same feeling as @Ed_S … but taking into consideration your points, maybe a less strict decision could be ‘limit activity’ to a certain degree rather than ‘erasure’?
I always wonder about these. Usually they are detected by the System immediately but from what you said, there’s probably a lot that are not.
What if they’re ‘reading’ through email notifications? For instance, they’re only interested in the notifications from Announcements category. I don’t know if it’s easy to get a metric on that.
Or maybe the forum is the kind people want to join and appear as ‘members’ as a way to support its message/project.