Only a true sociopath can do that. Actually that's wrong, clinically speaking. A sociopath could never turn them on in the first place. Here is the issue: your thoughts drive your emotions. Too many people are driven by emotion. Our society is sadly like this. It blows me away when I hear someone say 'I just want to be happy'. Happiness is only a by-product of the things you do and THINK on a daily basis. Garbage in, garbage out. You have a choice in what you think. Ponder this: you may have been happy yesterday. Hopefully you'll be reasonably happy tomorrow. But this minute is the only time you have to be happy now and that is completely contingent on what you are thinking. It's always now. Therefore your feelings are of your own making.
I'm not sure what exactly you mean by this.. But I suppose it would be different for different people. A friend of mine has no control whatsoever over her emotions, while I tend to be able to 'shut of emotion'. When I experience a very uncomfortable emotion, such as extreme sadness or depression, I simply close my eyes and calm myself. After a few minutes of telling myself I'm not upset, I believe it. I can then go about my day in a very neutral stage, neither happy nor sad, then eventually something happens to make me happy. So, I guess I sort of just turn my emotions off. If you would like some more information on how to do this, you can leave a comment and I will answer :)
You can turn them off temporarily when necessary but they will not dissipate. They may evolve into a different emotion or stay as they are on the back burner. They need to be confronted and reformed consciously for any type of real comfort or change to be obtained.
Psychopaths/sociopath have the ability to switch empathy on my using their "mirror neurons" in rehabilitation they are shown film footage of two people fighting and are asked how they would feel if they were that person. These recent studies show positive results in how we can rehabilitate Psychopaths. Mindful meditation does not mean that you have no emotion rather than to let the emotion pass through without holding on to it. This can be done with just labelling the emotions. By becoming self aware you are more likely to act rather than react because you are aware of you own sensations, feelings and thoughts.
To have feelings is a part of being human. You can calm your feelings through special techniques such as meditation etc. Even if you didn't have any type of emotions, you'd feel numb and that is still a feeling. Good question!
No. I've tried. Since you are human, the best you can do is react to how you feel in a positive way. For example, if you get angry, feel angry. Be aware of why you are angry and care enough about yourself to decide if being angry is a positive or negative state at the moment. If positive (someone is beating up your sister), kick the guy's ass! If negative (stuck in traffic and you are in a hurry), realize being angry just hurts you and doesn't change your situation. Accept the situation as beyond your control.