Taking your example, S2E11, we can most definitely clearly see segregation and racism between all the races.
Earth ponies are looked down upon, unicorns are snooty, and pegasi are rude, to put it simply.
And that episode is devoted to the foundation of equestria, the thing we're roleplaying.
One, Thank you for pointing this out... Rewatching the episode, the basic premise was as follows.
Earth ponies, unicorns, and pegisi had different racial biases against one another, and found that they couldn't rely on the other races to do what was needed. Namely, the Earth ponies grew food for the pegasi and unicorns in return for favorable weather and the cycle of the sun and moon respectively. (I'd love to point out that this means the unicorns raised the sun and moon, hence no Celestia or Luna, or at least they aren't in power). None of these tribes cared about another, and a freak blizzard (revealed later to be the work of windigos, hate fueled creatures) drove the earth ponies food production to a grinding halt. In turn the earth ponies denied their payments to the pegasi and unicorns, as they felt slighted on their deal, causing an even worse blizzard.
One important fact to note is that the blizzard caused the natural mistrust in the races to only INTENSIFY! Hence there was a rather large misgiving among the races to spark the blizzard in the first place. The blizzard itself only made the underlining problem worse!
From there the earth ponies, Pegasi, and Unicorns sent their leaders (Puddinghead, Commander Hurricane, and Princess Platinum) to the south to form colonies for each of their respective races and to establish colonies for their own race. Once the three discover that the other two races claimed the same land they did, they begin fighting once more and only fuel the windigo bringing the blizzard on this new land as well. At the conclusion of the play that assistants to the three leaders go and become friends, breaking the windigo curse and banishing them away with the fire of Friendship (a pink colored flame produced by Clover the Clever).
In effect, all this shows that before Luna and Celestia (who showed up sometime after all of this, or at the very least weren't part of the action at the time), the three tribes only worked with one another because they HAD TO. This RP experience (one of the first on this Roleplay server that seems to be dealing with various locations and not just held in the RP chat) is an AU (Alternate Universe) look at what could have been if instead of those three leaders, they had sent three different leaders to scout the land and get ready for colonization.
At NO point in this RP did any of the "leaders" demand anything from any player outside this RP (in fact, Imp leader of the earth ponies <as i was the only one around at the time>) made a point in declaring that his clan was one of many of the earth pony race, and he was merely the leader of his own clan (who was apparently the first to arrive), and hence the power of his race at that given time.
Everypony needs to seriously chill out with "OMG I'M NOT A LEADER MAKE ME ONE PLOX", none of us are planning on going and demanding service from another player, and it was just a fun RP experience that other players could join in on if they so wished. I know the changlings had not only a queen, but an architect and a few drones while the leaders were talking to them. It's just a fun RP, that happens to start with a canon situation with an AU twist.
Players who don't want in on the Roleplay, relax and go about your business, those who want to play, go in and let them know. But please stop trying to disrupt an RP because you don't like the idea of "Leaders" because it makes you feel less important when you aren't automatically declared "god of all i see".
Also, as a final point...
"Tsarbomb: Equestria: Colonizations is a roleplay survival world. You are a pioneer that has come south from the frozen ancestral pony lands to colonize this new land of Equestria. "
Smart cookie (i swear they make these names just to make me feel silly for knowing this) originally called the location Earth over the recommended name of Dirtville. After the conflict they three leaders decided on the name Equestria and then magically jumped to them being a fully established country. Now.... call me cynical, or maybe just having read a history book at least once, but there is no way that the three races just magically lumped together all at once and magically became a nation overnight. It would take awhile, and there is still the question of how Luna / Celestia even arrived and took power in this new formed nation. Hence the RP suggested isn't too far outside the idea of the actual canon, with a few minor alterations made to avoid the whole "But i'm playing hurricane" as well as to give reasons for Zebra, Crystal ponies, Bat ponies, and Changlings being around (ALL OF WHICH WEREN'T TO BEGIN WITH).
TL;DR:
This is a fun RP that some members tried to do.
Ponies are taking the "Leader" term way too far and are worried about these "Leaders" demanding things of them.
That's never happened, relax and let the RPers do their RPs.
AU (Alternate Universe) FTW (For The Win).