Good points all. IMO:

It's different strokes for different folks.

If they are not your master, miss, dom/me, then don't feel required to use that title if it's not part of their handle (username).

Some of the doms online have earned my respect and I will call them Sir or your lordship, but it's more for fun and to honor them. Note: they are not my master. They've not asked me to use those titles.

I may be Miss to my Nathaniel, and pet to T, but to the forums, I'm just Ruby in casual conversation.

In the Lord Mobius's dungeon, that's altogether different, cause we are keeping the continuity of a storyline going.

Please note: I have spoken to a number of subs who have been told by their masters/dom/mes to always use the former title for another master/dom/mes unless specifically requested not to by that person.

So, while someone else may not be using titles, others will continue to do so.