You knew I'd pitch in...
As stated earlier, the term "Captain" as used in civilian aviation is nothing more than a position within the organisation. Those calling themselves "Captain" in this context outside the working environment have no right to do so. Anyone doing so is a bit sad...
A Salvation Army officer has more right to use the term as a title than any flyboy.
What is it with some of you? Are you so insecure as to rely on the(probably non-existent) adulation that may come with the sobriquet?
What matters is the ability to do your job as safely and as professionally as is reasonably possible.
The next most important matter is that of your salaries. Some airlines, particularly carriers in the 'States, are paying their "Captains" so much that there is a very real risk that more will be out of work as a result of their current financial woes.