Fortunately, the forums have in built features such as flagging and blocking to deal with those situations.
Here, civility only ends when one makes the decision to stop being civil. It’s no less simple than that pal 
Haha you’re wasting your time searching silly, because nobody did!
That’s the marvelous thing about public forums in this lovely place we call the Internet. Anybody can add to a discussion whenever they want. In a similar vein it also means you can choose to respond like… that