Did I flag someone right out of fluther?

I posted a question that got some extremely offensive answers from what appeared to be a new fluther community member. After the first post, I responded on the thread that the answer was pretty off-topic (and arguably offensive, but I wanted to keep that to myself in order for the person to respond). The next post was even “worse” and was edited twice in order to include more outlandish examples (read: more offensive ones). I decided to flag both, and started writing a message to the individual stating why I was flagging them and suggested a new thread if the member thought it was something worth talking about.

I hit send, and the member had disappeared.

Was that me? If so, I’m interested what the standards are for a mod to determine that a member has crossed the line…and has this happened to anyone else?