I think the use of things like "sir" is the result of poor translation tools, and the writer using a specific word in their local language that does not translate well without proper context, which translation tools usually cannot do.

The association of people using the word "sir" with those who do not know what they are talking about is the result of a number of things:

1 - There is an extreme gap in the standard of living in places like Indonesia and affluent neighborhoods in the US. This means that not only is the $0.55 or so a low level member can earn from making one post is a lot of money (in terms of his standard of living), but also the time spent not posting in either learning about Bitcoin, the subject topic, or in making an english post in proper english is worth a lot in terms of what could have been paid for if this time was spent posting.

2 - We have rule 27 that says:
This with the fact that there are a disportionate number of english speakers (as their primary language, and their 1st language), who have an in-depth understanding of Bitcoin, and actively contribute to Bitcoin (there appear to be a small number of people who speak Chinese who actively contribute to the bitcoin-dev mailing list, however the problem does not appear to be cause by those in/from China), means it is more difficult for non-english speakers to learn about Bitcoin. If this rule was removed, some users who spend a lot of time helping others might be willing to spend time in some of the local section, using translation tools, to help people learn about Bitcoin.

3 - The Indonesia local section is the 2nd largest local sub behind the Russia local sub, as measured by total posts, yet it does not have any kind of "beginners" nor "technical discussion" section (many other local subs do have these kinds of sections). This means that Indonesians who want to learn about Bitcoin do not have a forum to do so in their local language. It would probably be a good idea to add some kind of beginners section in Indonesia.