One of my (many) systems.
 

An interested third party contacted us and we had discussions.

Following these discussions we concluded the thread may have developed in such a way as to now be in breach of copyright of a commercially marketed system.

That being the case we of course needed to delete the posts in question.

Our system allows us to delete one post at a time or the entire thread. It would have been very time consuming removing one post at a time, so the entire thread has been deleted.