I have not been a part of this discussion about prisoners donating organs, but I would agree that the original post was not about "forcing" donation from prisoners or anything like that. It was simply that poster saying he/she thought some good may come from allowing JA to donate organs. Then the discussion went in a totally different direction ie: forced donation, organ memory, etc.
I personally, do not agree with prisoner donations for a myriad of reasons, but have no problem with a discussion about all different points of view. The problem comes in when someone feels very strongly one way or another and is unable to let others express their opinion without describing their opinion as vile, cruel, etc. Everyone has a right to THEIR opinion and can disagree without using words that will incite an argument.
If you want to see an article that shows the issue from a lot of different viewpoints; doctors, organ donation coordinators, prisoners, etc this is a really interesting article (someone else posted it earlier so they deserve the credit for finding this interesting article).
http://www.nytimes.com/roomfordebate/2013/04/25/should-prisoners-be-allowed-to-donate-their-organs