There's all my comments gone? 

The innuendo contained in some of them, was the best I've ever seen.

Surely be very definition, innuendo can't be classed as inappropriate content.

Maybe it was part of a thread with deleted members?

Some of my comments (haven’t written many though) have been deleted as some members left. If it were comments on one of their pages or as replies to their comments it probably got deleted while deleting their content, too.