Of course, morally that would be the right thing to do. But for example a similar mistake could be someone losing their keys for their account. I doubt that you'd vouch for them to be able to get their stake back. Such mistakes are very bitter, but the affected ones will have to accept them.
As @blocktrades said, and I tried to say as well, individual proposals aren't something that's impossible. I just think that if we're gonna put that into the blockchain code as a hardfork, we should keep all emotions out of that if you know what I mean.
I totally want them to receive their funds back. No doubt about that :)
Your point about losing one's keys is clever. Personally, I don't support key manipulation, so sadly it's game over. People are responsible.
If you have no clue what you are doing, not voting seems to be the only reasonable choice before learning the system. However the same witnesses who made the exclusion list were beating the drum to get people to vote witnesses which undoubtedly pressured some people to make mistakes.
It is a very very unfortunate situation for them, and I am all in for supporting them however possible. (I will vote on the proposals in a way in which they will get their funds back)