mensetmanus1861
mensetmanus1861 on Hacker News
The folks running the course do have a screening by asking you certain questions in the enrollment form and they do ask you to talk to someone if you are confused or concerned about any question. It is not a strong screening but screening nonetheless. How effective it is, I don't know and it also comes down to how forthcoming the student is in clearly stating his/her condition.
Having said the above, people do experience intense emotions like you mentioned as I observed first hand. My take based on what I learnt in the course and afterwards is that throughout life since we are born, we experience life and it builds up certain kind of emotions in ourselves. Depending on who had what experience in life, the build up can be very strong. Vipassana attempts to rid you of the emotional build up that one has accumulated. The act of crying or shouting, or anything else is an act of getting the emotion out of the system and be left with a cleaner state of mind. How long the emotional outburst will continue will depend on how much one has accumulated in life.
I would summarize this as - In order to fill a cup with afresh, you must empty it first. You can't fill an already full cup.
One may also want to read U G Krishnamurthi. One of his quotes that I really like is `When the movement in the direction of becoming something other than what you are isn't there any more, you are not in conflict with yourself.` another way to interpret this is that emotional build happens when you action is in conflict with your inner self and over a period of time, the build up keeps growing resulting in problems (I have had emotional build ups that I have worked very hard to get rid of).
You also become comfortable as to who you are vs seeking validation about yourself.
Overall, it was a positive experience for me.
The output of meditation is supposed to be a clearer mind from before and it may take a while to reach the desired state of mind. Stoicism should not be misinterpreted as having no zest for life. One psychologist I know told me something that made an impression on me "Just because life is going to end or that many good things come to an end eventually doesn't mean you should not enjoy the present". I am sure different people have different outcomes but I think the purpose of meditation is to learn the joy of life. One could see stoicism as being pessimistic towards life. I personally see meditation as a tool that hopefully helps you derive the joy of living in every moment of your daily existence while not being attached to it so that that if the circumstance changes, you don't lose the joyfulness and adapt to the new things in life knowing that the change won't last either.