***** NOT A TEACHER *****
Great question!
I used to refer to the teachers and moderators here as "Teacher Bush" or "Moderator Obama." This was done to show respect to them
by using titles. But I was told that most of them were offended , so I now simply refer to them as "George" or "Barak."
Also, here in the United States, some people feel that it is "safer" to address police officers as "sir" or "ma'am." On the other hand,
some police officers may be offended if you "sir" them too often! Here in the United States we are told everyone is equal, so people
often take that to mean that there should be no social distinctions in speech. Nevertheless, some people "instinctively" show respect
to their "betters" or "superiors." For example, the letter carrier calls me "Mr. ___," and I reciprocate by calling him "Mr. ___." I am
guessing that most maids and gardeners do not "dare" address their employers by first name, although their bosses probably address them
by their first names. I am 75 years old, so I am of the "old school." I believe that everyone should keep his (her) place, but today
most people feel that there is no longer a place to keep. Yet -- most people dutifully address their physicians as "Dr. Reagan." I doubt
that many patients would dare say "I don't feel well today, Ronnie." On American TV talk shows, there may be a distinguished guest
named, for example, "Dr. Calvin Coolidge." Many people who call in will address him as "Dr. Coolidge," but some will ostentatiously
show that they are equal to him and say "I have a question for you, Cal." In our public high (secondary) schools, most students still
address their teachers as "Mr." or "Mrs." Of course, there are always some instructors who want to be "one of the guys," so they might
insist that the students call them by their first names. I noticed that at one fantastic ESL school for adults here in Los Angeles, most
of the students addressed their instructors by first name: "Nancy is a wonderful teacher." Maybe this is done to make the students
feel more comfortable and relaxed. (P.S. You said "English people," but I assumed that you meant "English-speaking people," so I
thought that you wanted comments about the United States, too.)