What do you think is the Best TOPIC that can gain 100k of responses?

rjvb to get a lot of responses you have to appeal to the 'things that we all have in common, like someone being mistreated in some way, or some common misunderstanding that we all have.it has to be something that cuts across the cultural barriers and appeals to all or most people here. I got over 100 responses to the idea of an elderly lady feeling bad because the bus driver gave her the last seat on the bus and left a much younger lady having to stand. it appealed to something inside most people.