Every time one of these goals is scored we see the replay, make our own decision, and then no matter how obvious it may seem we still sit in suspense as we anxiously await the call since we all know the calls on these are extremely inconsistent. I guess disallowing all goals off a player's skate could lead to problems where the officials can't tell if the puck went off the skate or his leg. However, kicking a puck is harder than shooting it except for certain instances like scrambles in the crease etc., so if kicking the puck is allowed I don't think it will lead to an epidemic of players opting to kick the puck instead of shoot it, so I think they should just allow all goals off of skates. It's not like they would be permitting them to pick up the puck and throw it and we wouldn't haves games being decided by one man's interpretation of what a kicking motion is.
I wouldn't want to see kicked goals allowed just because of the danger it poses to goalies. If there's a loose puck around the crease, I wouldn't want Marty reaching to cover it if players are trying to kick the thing in. I could see some dumbass like Cooke or Clarkson giving some goalie the old Glenn Healy bagpipe treatment.