If I cross paths with a classmate in class, unless I want to ask/say something, I remain silent, make eye-contact and give a soft smile, which is received well (except by those who consider me "close" as they expect a conversation, unless I'm "having another bad day".) However, if I run into a classmate outside of class, usually I'm called into a conversation, something that doesn't happen when we cross paths in class! Unfortunately, if I run into that individual again many times out of class in the future, there's a growing expectation for me to "initiate a conversation for a change"; an expectation which isn't there when we cross paths class! If I give my consistent silence, eye-contact and soft smile, the eventual conclusion is I "expect others to always put in the effort", which can lead to my presence never being acknowledged as a revenge move. Except, no one went unacknowledged by me. Obviously my behavior upsets some people, but I find it strange that my consistency gets different reactions from the same people. Any advice on this? Who's being rude? Do you say hello to every classmate you cross paths with, whenever and wherever?