Do not talk about politics
"Don't talk about politics.
Do not mention political candidates.
I hope I've made this clear." -- Kyle, USA
“Don't take a side politically, racially, religiously, or sexually. It's ok to discuss these issues with people you know well enough but if you take a strong stance on one of these hot button issues, you may be seen as an another outsider trying to force their 'more sophisticated' opinions on us. Just enjoy the conversation for what it is, conversation.” -- Ted, USA
Also, don't discuss race, gender, or obesity
"Don't make jokes, comments of throw opinions on sex/race/religion/fats/gays/class groups/US wars/communism/their politics. Stick to 'smile & nod' mode on any of these topics." -- Gonzalo, Chile
"Talking about healthy eating and exercise habits with a mixed group is like talking about politics or religion, someone is bound to get offended. Save it for people you know well." -- Steve, USA
"In your country, fat people might be shunned, and obesity is widely accepted as a health problem. In America, there's an odd duality of 'love your image' and 'skinny is good'. Being vocal about folks in Wal-Mart will almost certainly earn you looks - you're either a bigot or a superficial hater. Don't say that 'I'm not hating the person, I just think being fat is a serious health issue'. Just be mum about it." -- Nguyen, Vietnam