The etiquette of blogging?

Thanks to Richard for his very rapid comment on my last post.  I answered him back in a comment of my own, but was then reminded of something I read on Richard’s own blog about leaving the comments space to everyone else (I’ve already had my say in the original post, after all).  I find it almost impossible not to respond if someone comments on something I’ve written (or as my husband would put it, I am constitutionally incapable of letting someone else have the last word).  Are there rules about this kind of thing? And should I look on bestadviceforum to find them?

By the way, for anyone who’s not sure what the term means (I wasn’t myself) this is what Google Juice is…