You see, you could actually talk to them about it. Some people steer away from your opinion because they don't like the thought of it. Let them, it's just your opinion anyways. If someone blows off your opinion with clear responses that they don't like the thought of it then just back away. If someone bashes your opinion with wannabe-facts and idiotic comments towards you then give them living hell. Do not put a venting message on it, give them the damn hell and be over with it.