User Categorization or Censorship feature
It is unfortunate that there are some kinds of behavior we’ve had our fill of long ago in another place and time. Others endear themselves in sudden and unique ways. I for one would rather not maintain a list or have to remember the userid and infraction. The one I had at KGS with multiple categories was too much work and reached buffer overflow.
OGS appears to have two categories: Friend and Blocked. I am not sure how to find Help/FAQ so I don’t know exactly what Block does.
The KGS censor feature is easy but one can forget why an offender was condemned. After a while you might play them using a different account and decide to grant clemency. Other times that proves to be a mistake and then you remember exactly why you blacklisted them. Also, KGS lets you tag a user as a Buddy, Teacher, Fan (i.e., fan of this user)
DGS implemented a Contact List including User Categorization. As of 2014 the categories are:
Buddy, Friend, Student, Teacher, Fan, Troll, Site Crew, Miscellaneous.
Several action settings are available to apply to a user, most likely one you’d flag as a Troll:
Hide waitingroom games, Protect waitingroom games, Reject messages, Reject invitations, Hide forum posts (silly…if you think a lady’s ankle is X-rated, don’t look.)
The categories of Trolls I’d consider useful and pretty inclusive would be Escaper, Sandbagger, Poor Sportsmanship, F—ing A—hole.
The OGS community will probably have its own preferences for categories of users and what restrictions might be applied - with highest likelihood - to trolls is a subject for discussion and consideration of development resources and design constraints.