Today was the second (or third) time this happened to me on SO.
I've asked a question and some high reputation fellow has answered it with a possible solution. Specifically, the User suggested me to use KeyRemap4MacBook, I've downvoted it because it was not verified by the User if it worked, he then said about an option to alt map that I discovered didn't exist and made no sense. I've checked all by myself installing the tool and trying his key mappings with it to get on this conclusion.
The information that a possible solution doesn't work is valuable (e.g. anyone trying to solve the same problem could eliminate the work of verifying it before hand).
I think, because of his single downvote or little shame, he just deleted the answer (and all the comments along), just like this one.
To me, all this is not fair. I think this may be related to the pity problem, since the fellows are promptly deleting his downvoted answers, leaving only the upvoted-protected.
By downvoting I got -1 rep, a little after his deletion, it came back, but I've not minded by getting -1.
Is there a solution to this?
Sorry, I thought there was answer protection, but as everyone is saying, there is not.