I have noticed that there are some members that will register on your forum and not make a single post and disappear without being online. Do you usually leave their accounts alone or have them banned and removed from your forum? For me, cleaning up such accounts is necessary because they add no value to the forum with their zero post.
I don't believe it is appropriate to suspend unproductive users from internet forums because every single individual is going through unique periods in life and perhaps some people may not have the opportunity to log on consistently as much