Ah, I see. I misunderstood. I thought you meant the OP wasn't interested in conversing with strangers. I would have to say though that if I were the stranger involved and I didn't want to converse with the OP after the OP said "Hi", I certainly wouldn't reply with "Hi, buddy" in any tone. Unless I'm missing a meaning, "buddy" is a fairly friendly greeting and I would expect anyone I said it to to continue conversing.
If a total stranger said "Hi" to me in the street or in a hallway and I didn't want to talk to them, I would perhaps nod, or say "Hi" very quietly but keep walking, or I would say nothing, look straight ahead and walk faster! Still, I'm British and we generally assume that any stranger who starts talking to us out of the blue is a nutcase!
emsr2d2, Thanks for taking the time to read my question. In general, I am cordial and welcome talking with others.
When I said strangers, I meant new people that I come across in a particular context, not total passing by strangers on the street.
If I am in a shopping mall, and lets say a salesman approaches me or I approach someone for assistance, the conversation would start off with any of the following:
1) Hi there, is there anything I can help you with ...
2) Hi, how are you ...
3) How may I help you ...
3) Excuse me, can I talk to you for a minute....
4) Hello sir, would you be interested in looking at this product.....
5) Hello, how do I get to flower shop....
6) Hi, I am looking for a ...
But once in a while I come across macho (sorry, I don't have a better description) men, that start off the conversation with - Hi Buddy, .... or Haaaay Buddy, ... or add Buddy at the end of sentences. I find this unacceptable since I have seen it used among familiar friends not with new people. I have never heard Buddy being used by professional people as those from banks, hospitals, government offices, restaurants, or most service sectors. Strangely, I never heard it from any new people over the phone either.
I was hoping to get suggestions on what would be a quick way to let the other person in these brief encounters know that you are no "buddy" of theirs, without making it a big deal.
Thanks.