For what it is worth, here are my thoughts on Teddy Bruschi coming back and playing for the Patriots.
Everyone I hear or read seems to want to make a huge deal about, "His kids and his family." This just seems ludicrous to me. You are not part of his family, you are not his child, or his wife, or even his second cousin, so how can you proclaim to know what is best for his family. I imagine that to someone playing at the level he is at, with the amount of money that he already has in the bank, that to Bruschi playing football is what is important to him. I have met plenty of people in my life who love to work, love to be busy, and would never be happy just sitting around. My guess is that Bruschi's family realizes that playing in the NFL is a life long dream for him, something that means an incredible amount to him, and passing up any opportunity to continue doing that would be an incredible blow to Bruschi psychologically.
From what I have heard about his medical condition it seems like Bruschi is no more at risk playing football than he is walking down the street. If that is the case, then I can't understand why you would not let him back out there to play.