We always, and unfortunately this has happened a couple of times for us, make sure the group is informed. It is more transparent and reinforces that it is a privileged position so carries greater responsibility too (our super users can move posts, mark solutions and get double kudos).  This is the kind of message we post; Due to a recent incident one of our superusers, <name>, has been removed from this group. The details of this will remain between the individual and the Community Management team, but know that this action was not taken lightly. Participation in this group, whilst earned by contributions to our community, is predicated on continued adherence to the Community Guidelines. If there are any individual concerns, please feel free to contact me via private message. ... View more

We rolled out as a big batch and honestly, I think it caused some confusion as some members didn't see the blog about the launch. Starting small with badges for events, anniversaries and single actions would probably be a good start then roll out the multi action (kudos, solutions, posts, replies, etc) for ongoing activity later. That said, it only took a short time for people to see the badges as BAU so either approach works. ... View more

There is no option for it that I am aware of but you could fairly easily accomplish this by having your dev hide the post/reply buttons when a solution is present. The thread is not 'locked' per se but users will not be able to respond. You could even have this not apply for admins, allowing you to reply if required. ... View more

Twitter has a survey that Lithium have leveraged, Facebook do not. A survey that can be deployed on other channels is on their roadmap but not sure when to expect it. ... View more