@matabog; Perhaps it is not per-sé the case that people are offended. Some might be, but not necessarily all.
Perhaps it's me, since I'm lately started following the forum at bit more, but I started to notice that "new members", without taking the effort of introducing themselves, pop-up in Watch Repair Advice or another chapters, ask one or a few question(s), getting all sorts of advice from helpful (steady) members and thereafter don't even bother to report back, never mind writing a "Thank you very much".
I also noticed that if&when @oldhippy asks them politely to introduce themselves before posting a question, some never do and just disappear.
Perhaps a "compulsory" introduction works a bit like a threshold, shifting the more serious people who really want to become a (long term) member from the "by-passers"?
Personally I would never knock on somebodies door, they open up and I start to ask questions. For me there is noting wrong by giving a brief introduction of yourself; at least all forum members get an idea whom they dealing with, what kind of experience the new member has etc.
I gain from the forum and try to give something back. But if forum-members are happy with energy flowing "one-direction" to by-pass "members" ...... in the end of the day, it's up to each individual forum member to decide whether to help the "stranger" or not, and how often doing so before running out of steam because there is no coal in return?