I think that differences in behavioural cultures matter too much in order to have a clear understanding of other people's judgements... For example, I didn't know until recently that British people perceive the frankness of German or Belgian people (straight talking, "persistent" looking into the eyes etc) as threatening, as rudeness. Which for me is shocking because I value positively frankness, as honesty and openess. So IMO this kind of talk is possibly more relevant to the traveller's mentality (but it is an interesting nevertheless).