Shinobi Legends, as a community, is awful. That said, I am happy that I stopped roleplaying years ago. It's like the conservative versus the liberals; elitists versus pluralism.
On-topic: I can understand where OP is coming from. This is a subject that's been brought up fairly often over the years that I've roleplayed on SL.
It's often something that a lot of roleplayers feel rather strongly about, though some folk are rather indifferent. Elitism is pretty common on SL. Now, before you start, I don't see elitism as a bad thing. It's one of those terms that is often twisted to mean something completely different to the original definition.
In other cases, it's simply thrown around at the drop of a hat and can often be seen as being used to further a particular agenda. It's in a similar vein to the term 'troll' which also suffers from being used as an incorrect and unfair label.
Elitism in roleplay, has many definitions in my dictionary. Elitism can involve around striving to be the best one can be, with the roleplayer in question usually having rather high standards. It's a shame, but a lot of people seem to be treated like villains whenever they seek to stick to even the simplest of standards. I suppose some people just can't handle feeling excluded from roleplay, even if it's at least partially justified.
Now, this doesn't mean that 'elitist' roleplayers should go around dictating what every other roleplayer does, though at the same time if someone is knowingly indulging in a character concept that doesn't really line up with the canon lore then they have no business complaining or call them 'elitists hardcore roleplayers' if other roleplayers point out the flaws in a constructive manner.
Wanting to be the best you can be, having your own standards and offering advice isn't elitist. Choosing not to RP with someone if there is incompatibility between playing styles isn't elitist. Expecting players in a group to adhere to the rules of the group isn't elitist. Being good at something isn't elitist.
Acting like your standards are somehow more important or more acceptable than others' is one of the many definitions of elitism in my dictionary. Expecting or demanding that others follow your standards is. "Protips" which are less advice and more thinly veiled insults/accusations of doing it wrong are elitist. Sneering and mocking at other groups for being bad compared to yours is elitist. Mocking, insulting, despising, attacking (openly or passive-aggressively) other RP styles is elitist.
Just having standards is OK. Thinking less of others for not having them is where hardcore elitism starts, to me.
Of course, this is considering nobody's being (from an OOC standpoint) inappropriate, invasive, doing anything illegal, trying to disrupt anyone else's RP and so forth - that's on a whole other level, and RP is never a free pass to be an asshole.
Drawing the line at someone making you uncomfortable or doing something illegal isn't elitism. Calling them out on it isn't elitism. If you're a shitty person you deserve being called out; whether or not you're rping while at it is irrelevant. Dictating how people should behave in their own environment, is elitism.