My own take on the capitalization rules tends toward the live and let live. In chat rooms where the only means to communicate is text, then sure, it's a way to convey the equivalent of voice tone or body language. In a story, no, except in unusual circumstances (dialog, quotes from online typing, etc.).

Over the years I've come to appreciate the importance of structure to a submissive personality, even though I must confess I do not entirely understand it on a visceral level. I never criticize anyone for using the convention online, for just that reason. If it is The Way It Must Be Done, then so be it.

I never have seen the reason behind using medieval titles for nicknames. LordSlackjaw and SirStumblebum don't have positive connotations for me, since hereditary titles usually carry the baggage of genetic defects from far too much inbreeding. But to each their own. I settle for being called anything printable and repeatable.

Respect garnered by demand has a very short lifetime. I've found willing obedience to be far more valuable than the forced variety. Taking shortcuts may be tempting for the lazy, but in my experience making the investment in time with a low profile, non-threatening approach will draw out natural submissive traits that I can ruthlessly exploit (okay, I'm dreaming here, but hope springs eternal).