I think all altcoins will be added in the whitelist. There is always a good reason for something. I think its best that you add specific rules that you want to be added in the whitelist.
that is why I suggested a points system so each negative thing takes away points and each positive thing adds points
less than 0 points is blacklisted
0 points is grey listed
1+ points is whitelisted
all you need is a list of good and bad things for each coin
I am sure it would help people see what coins are better as they would have higher points and it would encourage devs to do more to get there points up
just an idea but it worth thinking about