Topic Terminator

Have you come across a topic terminator when you were trying to strike a conversation?

When the topic is about food, 

someone says "I eat to live, not live to eat"

When the topic is about gossip,

someone says "I only mind my own business"

When the topic is about luxury stuff,

someone says "Why waste money on those? Do you know a lot of people are suffering in hunger?"

When the topic is about investment,

someone says "Money is the root of all evil"

When the topic is about computer stuff and gadgets,

someone says "I can live better without those stuff"

When topic is about your own experience or encounter,

someone says "Sure or not? Don't bullshit!"