Forum answers quality will inevitably decrease as they attract people who are looking for fame, and just copy and paste links they found by entering keyword, and without verifying the answers.
There no silver bullet for this kind of problem, the only cure is to have Moderaters who are experts of the subject monitoring those forums.
I think someone has proposed having flags to mark that some answers as misleading so the forum will hide them and expand them on individual forum user's choice, and in the end it's not been implemented. (But cannot find it now)
I feel that in general, proposal that may lead to discouragement of replies are seldomly considered here. But at some point, I think it's appropiate to think of measures to proactively prevent "Bad money drives out good" type of thing from happening
(so far there's little hint for this to happen on major forums, but it's well possible in the future if nothing has been done.)
Just my 2 cents.
