Pax vobiscum! The rank thing is just a little novelty that lends this forum a distinct cache from those with similar basic terms of reference; those being primarily: rc modelling; military vehicles but particularly those of the tanker sort, and related military themes. But what really sets this one apart is a pronounced social element too; not to mention the often entertaining off-topic threads. If you look at a forum set up by servicemen like A.R.S.S.E, for example, much of the discussion there is
non-military. That forum appears to be a place to share opinions,whinges, jests, knowledge..and probably acts as a relief valve, I'd guess, for the pressures that build in the military sphere...and some of the drudgery. They do discuss things military too.
For my part, I drifted in here for the ideas, a few laughs, to learn stuff, and to broaden my horizons....and it's become something of a home away from home; a library away from the library; and a madhouse away from the madhouse

"Get your facts first, and then you can distort them as much as you please"- Mark Twain.