The last CS conf I went to (admittedly, a while ago), I did not run into people passing out papers unprompted. Is that what you mean? Just going up to people you don't know and handing it to them? Or, giving it to people you know, or are already talking to? I'm not sure I understand the situation.
> Just going up to people you don't know and handing it to them?
Standing in a hallway handing them out and discussing? I’ve seen it at aerospace conferences aplenty.
> giving it to people you know, or are already talking to?
This, too.