I've been playing on the server for almost an year now and more than half of that time I played indies. From my experience, indies do get treated differently.
Now of course generalization is not the case. Different factions have different ways of thinking. I actually noticed this behaviour more on the police/navy/army official factions side, but in a way this way of dealing with indies is understandable from their part.
Most new players wanna get fighting ships as soon as possible so naturally they invest their time in doing just that , buying a fighter/bomber/cap even.
Thing is they do not know, yet all the rules, the lore, diplomatic relations and so on, so they act according to their limited knowledge, sometimes making a mess of things and giving a poor impression to the officials present., and , well you know the rest.
On the other hand I have seen and have been in a position where I was just ignored, even treated like crap basically, because I did not have a official tag, regardless of the quality of my RP. Some people and I'm underlining some, tend to think they are better just because they are official and have more influence. Funnily enough a part of these people treat everyone like this , be they official or not.
So it mostly comes down to each and everyone of us, and how we think that indies should be treated and integrated in Disco.
Oh and about the RM, well RM usually RP like that, them being Rheinland stuck ups , with a superiority complex and a hate for outsiders. Now again this is their RP, at least that is the impression I got. It's fun sometimes to be on the other end of their RP.
I think that if during an RP interaction, someone manages to stir up an emotion inside you, be that hate, happiness, sadness etc, they are doing their job good.