If they do not have bad bread or bad BO or do not sprinkle me with their saliva when they talk then I do not mind, otherwise I constantly keep moving away from them . Some people do not take hint and would keep coming closer and closer and I keep on moving away and away. But yes it is good manners to talk to anyone keeping a safe distance in between.
But yes it is good manners to talk to anyone keeping a safe distance in between.