I find this to be a little ethnocentric. I see that you're just trying to help others be able to post constructively, but this is at a disadvantage for those who grew up with a different native language. Ethnocentrism is where there is a belief that one ethic group or culture is superior to another. This is usually implied and done impassingly, as like every other racial comment. This treatment toward Eastern posters is an example of ethnocentrism.
I'm really glad you pointed out the "East vs. West" issue. This is usually dismissed because the users in this forum have their freedom of speech or to their own opinion. I won't deny it, there are in fact many shitposters coming from the East and (shamingly) from my own country. For someone who's born with a different native language other than english, it's going to be hard for them to construct sentences in the correct grammar. If they were to excel and post constructively, it's true that they may do better within their local boards which may lack sMerit sources. You see, this gives them minimal opportunity to contribute and participate in the forum if they were confined to their local boards.
Obviously, the "sir, dear" remark is a cultural barrier. This is being said by the Eastern because of their value of respect, and they do this out of habit because they got so used to it. A habit to one is offensive to another. So who should adjust here?
Perhaps this forum lacks a little cultural relativism. All cultures are worthy in their own right and are of equal value. Are the opinions of others no longer of value just because it is not properly constructed in English?
1. East vs. West
It is a common impression that most of the people spamming or shit-posting are from the low income countries in the eastern hemisphere. Indian, Indonesia, Thailand, Phillipines, Vietnam etc. To people from these countries, I'd say that its our own mistake that the west sees us as incompetent and lazy when we write incoherent sentences.
By showing our willingness to spend our time on making 1000 useless posts, we confirm that we are in fact useless. Its then natural to have disdain for such actions. Accusing the other person of racism then is no defence. If you really want to mount a defence, then do some real work and prove your worth.
This constant trend to use salutations (Sir, Dear, Respected) is also a cultural difference. To you, it maybe normal to show respect to someone in a position of power over you, but as far as netiquette and western work culture is concerned, this is considered sycophancy/ ass-kissing. This is considered the hallmark of an incapable, scheming individual and not of respect. So avoid this like a plague. Instead, address people with a normal Mr./ Miss
It's true that Eastern people use the words Sir/ Dear Sir, Respected Sir because they want to respect the addressee. In our countries if young addresses his elders without using respect paying words, he/she is treated as an uncivilized, uneducated person. In response elders are expected to treat younger with love and respect. But in West is opposite. They take it otherwise. This is the forum created and developed by the westerns. The language is also western, i.e. English. But the promoters / founders / developers wanted to spread it breaking national boundaries. That is why we have been allowed access to this platform though no one works without self interests.
So if someone gets hurt / angry by my cultural respect habitual behavior ; I must try to be intelligent enough not to pay so much respect and avoiding usage of such words while talking them.
Though ass kissers are not exceptions.